diff --git a/gramps/src/EditPerson.py b/gramps/src/EditPerson.py
index 2d9943dfa..bfcb70b78 100644
--- a/gramps/src/EditPerson.py
+++ b/gramps/src/EditPerson.py
@@ -183,7 +183,7 @@ class EditPerson:
         birth = person.getBirth()
         death = person.getDeath()
 
-        self.get_widget("gid").set_text(str(person.getId()))
+        self.get_widget("gid").set_text(person.getId())
         self.event_list.set_column_visibility(3,Config.show_detail)
         self.name_list.set_column_visibility(1,Config.show_detail)
         self.attr_list.set_column_visibility(2,Config.show_detail)
@@ -228,7 +228,7 @@ class EditPerson:
         photo_list = person.getPhotoList()
         if len(photo_list) != 0:
             thumb = self.db.getSavePath() + os.sep + ".thumb" + \
-                    os.sep + "i%d.jpg" % self.person.getId()
+                    os.sep + "i%s.jpg" % self.person.getId()
             RelImage.check_thumb(photo_list[0].getPath(),thumb,const.picWidth)
             self.load_photo(thumb)
     
@@ -934,7 +934,7 @@ def on_primary_photo_clicked(obj):
     edit_person_obj.load_images()
 
     thumb = edit_person_obj.db.getSavePath() + os.sep + ".thumb" + os.sep + \
-            "i%d" % edit_person_obj.person.getId()
+            "i%s" % edit_person_obj.person.getId()
     
     RelImage.mk_thumb(savePhoto,thumb,const.picWidth)
     edit_person_obj.load_photo(thumb)
@@ -1123,7 +1123,7 @@ def on_savephoto_clicked(obj):
     if os.path.exists(filename) == 0:
         return
 
-    prefix = "i" + str(edit_person_obj.person.getId())
+    prefix = "i%s" % edit_person_obj.person.getId()
     if edit_person_obj.external.get_active() == 1:
         if os.path.isfile(filename):
             name = filename
@@ -1342,7 +1342,7 @@ def on_convert_to_private(obj):
     edit_person_obj = obj.get_data("m")
     photo = edit_person_obj.person.getPhotoList()[edit_person_obj.selectedIcon]
 
-    prefix = "i" + str(edit_person_obj.person.getId())
+    prefix = "i%s" % edit_person_obj.person.getId()
     name = RelImage.import_photo(photo.getPath(),edit_person_obj.path,prefix)
 
     photo.setPath(name)
diff --git a/gramps/src/EditSource.py b/gramps/src/EditSource.py
index c5f181aee..5444c9cb3 100644
--- a/gramps/src/EditSource.py
+++ b/gramps/src/EditSource.py
@@ -101,7 +101,7 @@ class EditSource:
         self.top = self.top_window.get_widget("sourceEditor")
         self.top.set_data(SOURCE,self)
 
-        if self.source.getId() == -1:
+        if self.source.getId() == "":
             self.top_window.get_widget("add_photo").set_sensitive(0)
             self.top_window.get_widget("delete_photo").set_sensitive(0)
 
@@ -242,7 +242,7 @@ def on_savephoto_clicked(obj):
     if os.path.exists(filename) == 0:
         return
 
-    prefix = "s" + str(edit_source_obj.source.getId())
+    prefix = "s%s" % edit_source_obj.source.getId()
     if edit_source_obj.external.get_active() == 1:
         if os.path.isfile(filename):
             name = filename
@@ -313,7 +313,7 @@ def on_convert_to_private(obj):
     edit_source_obj = obj.get_data("m")
     photo = edit_source_obj.source.getPhotoList()[edit_source_obj.selectedIcon]
 
-    prefix = "i" + str(edit_source_obj.source.getId())
+    prefix = "i%s" % edit_source_obj.source.getId()
     name = RelImage.import_photo(photo.getPath(),edit_source_obj.path,prefix)
 
     photo.setPath(name)
diff --git a/gramps/src/Marriage.py b/gramps/src/Marriage.py
index b8c60547e..8693d3261 100644
--- a/gramps/src/Marriage.py
+++ b/gramps/src/Marriage.py
@@ -554,7 +554,7 @@ def on_savephoto_clicked(obj):
     if os.path.exists(filename) == 0:
         return
 
-    prefix = "f" + str(marriage_obj.family.getId())
+    prefix = "f%s" % marriage_obj.family.getId()
     name = RelImage.import_photo(filename,marriage_obj.path,prefix)
     if name == None:
         return
diff --git a/gramps/src/RelLib.py b/gramps/src/RelLib.py
index ff711b7bb..6776d1d53 100644
--- a/gramps/src/RelLib.py
+++ b/gramps/src/RelLib.py
@@ -297,7 +297,7 @@ class Person:
     female = 0
 
     def __init__(self):
-        self.id = -1
+        self.id = ""
         self.PrimaryName = None
         self.EventList = []
         self.FamilyList = []
@@ -342,7 +342,7 @@ class Person:
         self.urls.append(url)
     
     def setId(self,id) :
-        self.id = id
+        self.id = str(id)
 
     def getId(self) :
         return self.id
@@ -581,7 +581,7 @@ class Family:
         self.Divorce = None
         self.type = ""
         self.EventList = []
-        self.id = -1
+        self.id = ""
         self.photoList = []
         self.note = Note()
         self.attributeList = []
@@ -613,7 +613,7 @@ class Family:
         self.note = obj
 
     def setId(self,id) :
-       	self.id = id
+       	self.id = str(id)
 
     def getId(self) :
        	return self.id
@@ -688,10 +688,10 @@ class Source:
         self.callno = ""
         self.note = Note()
         self.photoList = []
-        self.id = -1
+        self.id = ""
         
     def setId(self,newId):
-        self.id = newId
+        self.id = str(newId)
 
     def getId(self):
         return self.id
diff --git a/gramps/src/WriteXML.py b/gramps/src/WriteXML.py
index 4736a5a13..5aa7a8fcb 100644
--- a/gramps/src/WriteXML.py
+++ b/gramps/src/WriteXML.py
@@ -114,9 +114,9 @@ def dump_source_ref(g,source_ref):
             t = source_ref.getText()
             d = source_ref.getDate().getSaveDate()
             if p == "" and c == "" and t == "" and d == "":
-                g.write("<sourceref ref=\"%d\"/>\n" % source.getId())
+                g.write("<sourceref ref=\"%s\"/>\n" % source.getId())
             else:
-                g.write("<sourceref ref=\"%d\">\n" % source.getId())
+                g.write("<sourceref ref=\"%s\">\n" % source.getId())
                 write_line(g,"spage",p)
                 writeNote(g,"scomments",c)
                 writeNote(g,"stext",t)
@@ -130,7 +130,7 @@ def dump_source_ref(g,source_ref):
 #-------------------------------------------------------------------------
 def write_ref(g,label,person):
     if person:
-        g.write('<%s ref="%s"/>\n' % (label,str(person.getId())))
+        g.write('<%s ref="%s"/>\n' % (label,person.getId()))
 
 #-------------------------------------------------------------------------
 #
@@ -139,7 +139,7 @@ def write_ref(g,label,person):
 #-------------------------------------------------------------------------
 def write_id(g,label,person):
     if person:
-        g.write('<%s id="%s">\n' % (label,str(person.getId())))
+        g.write('<%s id="%s">\n' % (label,person.getId()))
 
 #-------------------------------------------------------------------------
 #
@@ -150,9 +150,9 @@ def write_family_id(g,family):
     if family:
         rel = family.getRelationship()
         if rel != "":
-            g.write('<family id="%s" type="%s">\n' % (str(family.getId()),rel))
+            g.write('<family id="%s" type="%s">\n' % (family.getId(),rel))
         else:
-            g.write('<family id="%s">\n' % str(family.getId()))
+            g.write('<family id="%s">\n' % family.getId())
 
 #-------------------------------------------------------------------------
 #
@@ -229,7 +229,7 @@ def exportData(database, filename, callback):
     g.write("<people")
     person = database.getDefaultPerson()
     if person:
-        g.write(" default=\"" + str(person.getId()) + "\"")
+        g.write(" default=\"" + person.getId() + "\"")
     g.write(">\n")
 
     total = len(personList) + len(familyList)
@@ -308,7 +308,7 @@ def exportData(database, filename, callback):
         write_ref(g,"childof",person.getMainFamily())
         for alt in person.getAltFamilyList():
             g.write("<childof ref=\"%s\" mrel=\"%s\" frel=\"%s\"/>\n" % \
-                    (str(alt[0].getId()), alt[1], alt[2]))
+                    (alt[0].getId(), alt[1], alt[2]))
 
         for family in person.getFamilyList():
             write_ref(g,"parentin",family)
@@ -362,7 +362,7 @@ def exportData(database, filename, callback):
     if len(sourceList) > 0:
         g.write("<sources>\n")
         for source in sourceList:
-            g.write("<source id=\"" + str(source.getId()) + "\">\n")
+            g.write("<source id=\"" + source.getId() + "\">\n")
             write_line(g,"stitle",source.getTitle())
             write_line(g,"sauthor",source.getAuthor())
             write_line(g,"spubinfo",source.getPubInfo())
@@ -381,7 +381,7 @@ def exportData(database, filename, callback):
     if len(db.getBookmarks()) > 0:
         g.write("<bookmarks>\n")
         for person in db.getBookmarks():
-            g.write("<bookmark ref=\"" + str(person.getId()) + "\"/>\n")
+            g.write("<bookmark ref=\"" + person.getId() + "\"/>\n")
         g.write("</bookmarks>\n")
 
     g.write("</database>\n")
diff --git a/gramps/src/gramps_main.py b/gramps/src/gramps_main.py
index db078e944..f22e0b308 100755
--- a/gramps/src/gramps_main.py
+++ b/gramps/src/gramps_main.py
@@ -273,7 +273,7 @@ def redraw_child_list(filter):
         if filter and person.getMainFamily() != None:
             continue
         addChildList.append([utils.phonebook_name(person),birthday(person),\
-                             str(person.getId())])
+                             person.getId()])
         addChildList.set_row_data(index,person)
         index = index + 1
         
@@ -1258,7 +1258,7 @@ def modify_statusbar():
     else:
         pname = Config.nameof(active_person)
         if Config.status_bar == 1:
-            name = "[%s] %s" % (str(active_person.getId()),pname)
+            name = "[%s] %s" % (active_person.getId(),pname)
         elif Config.status_bar == 2:
             name = pname
             for attr in active_person.getAttributeList():
@@ -1859,7 +1859,7 @@ def display_marriage(family):
                 if len(child.getPhotoList()) > 0:
                     attr = attr + "P"
 
-            clist.append([Config.nameof(child),str(child.getId()),\
+            clist.append([Config.nameof(child),child.getId(),\
                           gender,birthday(child),status,attr])
             clist.set_row_data(i,child)
             i=i+1
@@ -2011,7 +2011,7 @@ def apply_filter():
                 gender = const.female
             bday = person.getBirth().getQuoteDate()
             dday = person.getDeath().getQuoteDate()
-            clistadd([gname(name,alt),str(person.getId()), gender,bday, dday],\
+            clistadd([gname(name,alt),person.getId(), gender,bday, dday],\
                      person)
         i = i + 1
 
diff --git a/gramps/src/plugins/GraphViz.py b/gramps/src/plugins/GraphViz.py
index a9b24ce40..f89121239 100644
--- a/gramps/src/plugins/GraphViz.py
+++ b/gramps/src/plugins/GraphViz.py
@@ -213,12 +213,10 @@ def dump_person(person_list,file):
             continue
         father = family.getFather()
         if father and father in person_list:
-            file.write('p' + str(person.getId()) + ' -> p')
-            file.write(str(father.getId()) + ';\n')
+            file.write('p%s -> p%s;\n' % (person.getId(), father.getId()))
         mother = family.getMother()
         if mother and mother in person_list:
-            file.write('p' + str(person.getId()) + ' -> p')
-            file.write(str(mother.getId()) + ';\n')
+            file.write('p%s -> p%s;\n' % (person.getId(), mother.getId()))
 
 #########################################################################
 #
@@ -231,9 +229,8 @@ def dump_index(person_list,file):
     for person in person_list:
         name = person.getPrimaryName().getName()
         id = person.getId()
-#        file.write('p' + str(id) + ' [shape=box, fontsize=11, ')
-        file.write('p' + str(id) + ' [shape=box, ')
-        file.write('fontname="Arial", label="' + name + '"];\n')
+        file.write('p%s [shape=box, ' % id)
+        file.write('fontname="Arial", label="%s"];\n' % name)
 
 #------------------------------------------------------------------------
 #
diff --git a/gramps/src/plugins/HtmlReport.py b/gramps/src/plugins/HtmlReport.py
index 14f595893..057827aeb 100644
--- a/gramps/src/plugins/HtmlReport.py
+++ b/gramps/src/plugins/HtmlReport.py
@@ -369,7 +369,7 @@ def name_or_link(individual, prefix):
     name = individual.getPrimaryName().getRegularName()
     if individual in ind_list:
         id = individual.getId()
-        return "<A HREF=\"" + prefix + str(id) + ".html\">" + name + "</A>"
+        return "<A HREF=\"" + prefix + id + ".html\">" + name + "</A>"
     else:
         return name
 
@@ -392,7 +392,7 @@ def write_reference(html, parent, prefix):
 
 def dump_person(person,prefix,templateTop,templateBottom,targetDir):
 
-    filebase = "%s%d.html" % (prefix,person.getId())
+    filebase = "%s%s.html" % (prefix,person.getId())
     html = open(targetDir + os.sep + filebase,"w")
 
     name = person.getPrimaryName().getRegularName()
@@ -539,7 +539,7 @@ def dump_index(person_list,filename,prefix,templateTop,templateBottom,targetDir)
     for person in person_list:
         name = person.getPrimaryName().getName()
         id = person.getId()
-        html.write("<A HREF=\"%s%d.html\">%s</A><BR>\n" % (prefix,id,name))
+        html.write("<A HREF=\"%s%s.html\">%s</A><BR>\n" % (prefix,id,name))
 
     for line in templateBottom:
         html.write(line)
diff --git a/gramps/src/plugins/Merge.py b/gramps/src/plugins/Merge.py
index 4a46ff807..4f4eeb7b0 100644
--- a/gramps/src/plugins/Merge.py
+++ b/gramps/src/plugins/Merge.py
@@ -538,8 +538,8 @@ class Merge:
         else:
             mother2 = ""
 
-        label1 = "%s (%s)" % (_("First Person"),str(person1.getId()))
-        label2 = "%s (%s)" % (_("Second Person"),str(person2.getId()))
+        label1 = "%s (%s)" % (_("First Person"),person1.getId())
+        label2 = "%s (%s)" % (_("Second Person"),person2.getId())
         
         self.topDialog.get_widget("PersonFrame1").set_label(label1)
         self.topDialog.get_widget("PersonFrame2").set_label(label2)
@@ -613,7 +613,7 @@ class Merge:
                     name = "unknown"
                 else:
                     name = spouse.getPrimaryName().getName() + \
-                           " (" + str(spouse.getId()) + ")"
+                           " (" + spouse.getId() + ")"
                 self.topDialog.get_widget("spouse1").append([name])
 
         length = min(len(p2list),3)
@@ -631,7 +631,7 @@ class Merge:
                     name = "unknown"
                 else:
                     name = spouse.getPrimaryName().getName()  + \
-                           " (" + str(spouse.getId()) + ")"
+                           " (" + spouse.getId() + ")"
                 self.topDialog.get_widget("spouse2").append([name])
 
         self.mergee = person1
diff --git a/gramps/src/plugins/WebPage.py b/gramps/src/plugins/WebPage.py
index a9f521bc7..fca29252d 100644
--- a/gramps/src/plugins/WebPage.py
+++ b/gramps/src/plugins/WebPage.py
@@ -177,7 +177,7 @@ class IndividualPage:
         self.doc.start_paragraph("Data")
         if person:
             if person in self.list:
-                self.doc.start_link("i%s.html" % str(person.getId()))
+                self.doc.start_link("i%s.html" % person.getId())
             self.doc.write_text(person.getPrimaryName().getRegularName())
             if person in self.list:
                 self.doc.end_link()
@@ -215,7 +215,7 @@ class IndividualPage:
     #
     #--------------------------------------------------------------------
     def create_page(self):
-        filebase = "i%d.html" % (self.person.getId())
+        filebase = "i%s.html" % self.person.getId()
         self.doc.open("%s%s%s" % (self.dir,os.sep,filebase))
 
         photo_list = self.person.getPhotoList()
@@ -378,7 +378,7 @@ class IndividualPage:
             self.doc.start_cell("NormalCell",2)
             self.doc.start_paragraph("Spouse")
             if spouse:
-                self.doc.start_link("i%s.html" % str(spouse.getId()))
+                self.doc.start_link("i%s.html" % spouse.getId())
                 self.doc.write_text(spouse.getPrimaryName().getRegularName())
                 self.doc.end_link()
             else:
@@ -410,7 +410,7 @@ class IndividualPage:
                         first = 0
                     else:
                         self.doc.write_text('\n')
-                    self.doc.start_link("i%s.html" % str(child.getId()))
+                    self.doc.start_link("i%s.html" % child.getId())
                     self.doc.write_text(child.getPrimaryName().getRegularName())
                     self.doc.end_link()
                 self.doc.end_paragraph()
@@ -760,8 +760,7 @@ def dump_index(person_list,styles,template,html_dir):
     person_list.sort(sort.by_last_name)
     for person in person_list:
         name = person.getPrimaryName().getName()
-        id = person.getId()
-        doc.start_link("i%s.html" % str(person.getId()))
+        doc.start_link("i%s.html" % person.getId())
         doc.write_text(name)
         doc.end_link()
         doc.newline()
diff --git a/gramps/src/plugins/WriteGedcom.py b/gramps/src/plugins/WriteGedcom.py
index 319198912..304a97dc8 100644
--- a/gramps/src/plugins/WriteGedcom.py
+++ b/gramps/src/plugins/WriteGedcom.py
@@ -333,7 +333,7 @@ def write_person_name(g,name,nick):
 def write_source_ref(g,level,ref):
     if ref.getBase() == None:
         return
-    g.write("%d SOUR @S%s@\n" % (level,str(ref.getBase().getId())))
+    g.write("%d SOUR @S%s@\n" % (level,ref.getBase().getId()))
     if ref.getPage() != "":
         g.write("%d PAGE %s\n" % (level+1,ref.getPage()))
     if ref.getText() != "" or ref.getDate().getDate() != "":
@@ -425,11 +425,11 @@ def write_person(g,person):
 
     family = person.getMainFamily()
     if family != None and family in family_list:
-        g.write("1 FAMC @F%s@\n" % str(family.getId()))
+        g.write("1 FAMC @F%s@\n" % family.getId())
         g.write("2 PEDI birth\n")
 
     for family in person.getAltFamilyList():
-        g.write("1 FAMC @F%s@\n" % str(family[0].getId()))
+        g.write("1 FAMC @F%s@\n" % family[0].getId())
         if string.lower(family[1]) == "adopted":
             g.write("2 PEDI adopted\n")
         
@@ -537,7 +537,7 @@ def exportData(database, filename):
             g.write("1 CHIL @I%s@\n" % person.getId())
 
     for source in source_list:
-        g.write("0 @S%s@ SOUR\n" % str(source.getId()))
+        g.write("0 @S%s@ SOUR\n" % source.getId())
         if source.getTitle() != "":
             g.write("1 TITL %s\n" % cnvtxt(source.getTitle()))
         if source.getAuthor() != "":