diff --git a/gramps2/ChangeLog b/gramps2/ChangeLog
index a2a7fb42a..f924b19f0 100644
--- a/gramps2/ChangeLog
+++ b/gramps2/ChangeLog
@@ -1,3 +1,6 @@
+2006-04-30  Don Allingham  <don@gramps-project.org>
+	* src/RelLib/_Person.py: prevent duplicate entries in family lists
+
 2006-04-29  Don Allingham  <don@gramps-project.org>
 	* src/Editors/_EditFamily.py: fix Select Person calls
 	* src/docgen/Makefile.am: add ODSDoc.py
diff --git a/gramps2/src/RelLib/_Person.py b/gramps2/src/RelLib/_Person.py
index e2d6969e6..b8150a588 100644
--- a/gramps2/src/RelLib/_Person.py
+++ b/gramps2/src/RelLib/_Person.py
@@ -590,7 +590,8 @@ class Person(PrimaryObject,SourceBase,NoteBase,MediaBase,
             Person's L{Family} list.
         @type family_handle: str
         """
-        self.family_list.append(family_handle)
+        if family_handle not in self.family_list:
+            self.family_list.append(family_handle)
 
     def set_preferred_family_handle(self, family_handle):
         """
@@ -691,7 +692,8 @@ class Person(PrimaryObject,SourceBase,NoteBase,MediaBase,
         """
         if type(family_handle) not in (str ,unicode ):
             raise ValueError("expecting handle")
-        self.parent_family_list.append(family_handle)
+        if family_handle not in self.parent_family_list:
+            self.parent_family_list.append(family_handle)
 
     def clear_parent_family_handle_list(self):
         """