diff --git a/src/Filters/Rules/Event/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/Event/_HasNoteMatchingSubstringOf.py
index dbfed5b70..d0618e557 100644
--- a/src/Filters/Rules/Event/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/Event/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "Events having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """People having notes containing <subtring>"""
+    """People having notes containing <substring>"""
 
     name        = _('Events having notes containing <substring>')
     description = _("Matches events whose notes contain text "
diff --git a/src/Filters/Rules/Family/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/Family/_HasNoteMatchingSubstringOf.py
index 8a9d83af8..56d4631ce 100644
--- a/src/Filters/Rules/Family/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/Family/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "People having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """People having notes containing <subtring>"""
+    """People having notes containing <substring>"""
 
     name        = _('Families having notes containing <substring>')
     description = _("Matches families whose notes contain text matching a substring")
diff --git a/src/Filters/Rules/Family/_MemberBase.py b/src/Filters/Rules/Family/_MemberBase.py
index 4b61444bd..7f9043ae0 100644
--- a/src/Filters/Rules/Family/_MemberBase.py
+++ b/src/Filters/Rules/Family/_MemberBase.py
@@ -24,7 +24,7 @@
 Set of wrappers for family filter rules based on personal rules.
 
 Any rule that matches family based on personal rule applied
-to father, mather, or any child, just needs to do two things:
+to father, mother, or any child, just needs to do two things:
 > Set the class attribute 'base_class' to the personal rule
 > Set apply method to be an appropriate wrapper below
 Example:
diff --git a/src/Filters/Rules/MediaObject/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/MediaObject/_HasNoteMatchingSubstringOf.py
index c456e9745..8bdb55215 100644
--- a/src/Filters/Rules/MediaObject/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/MediaObject/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "Media having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """Media having notes containing <subtring>"""
+    """Media having notes containing <substring>"""
 
     name        = _('Media objects having notes containing <substring>')
     description = _("Matches media objects whose notes contain text "
diff --git a/src/Filters/Rules/Note/_MatchesSubstringOf.py b/src/Filters/Rules/Note/_MatchesSubstringOf.py
index 3b5afdf1c..5ae6f25e7 100644
--- a/src/Filters/Rules/Note/_MatchesSubstringOf.py
+++ b/src/Filters/Rules/Note/_MatchesSubstringOf.py
@@ -39,7 +39,7 @@ from Filters.Rules import Rule
 # "Events having notes that contain a substring"
 #-------------------------------------------------------------------------
 class MatchesSubstringOf(Rule):
-    """Notes having notes containing <subtring>"""
+    """Notes having notes containing <substring>"""
 
     labels      = [ _('Substring:')]
     name        = _('Notes containing <substring>')
diff --git a/src/Filters/Rules/Person/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/Person/_HasNoteMatchingSubstringOf.py
index c6e91e152..8f8fbd813 100644
--- a/src/Filters/Rules/Person/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/Person/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "People having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """People having notes containing <subtring>"""
+    """People having notes containing <substring>"""
 
     name        = _('People having notes containing <substring>')
     description = _("Matches people whose notes contain text matching a substring")
diff --git a/src/Filters/Rules/Place/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/Place/_HasNoteMatchingSubstringOf.py
index 48d8c8467..c71a25ac3 100644
--- a/src/Filters/Rules/Place/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/Place/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "Events having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """Places having notes containing <subtring>"""
+    """Places having notes containing <substring>"""
 
     name        = _('Places having notes containing <substring>')
     description = _("Matches places whose notes contain text "
diff --git a/src/Filters/Rules/Repository/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/Repository/_HasNoteMatchingSubstringOf.py
index 17d009efd..42a95aea3 100644
--- a/src/Filters/Rules/Repository/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/Repository/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "Events having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """Repos having notes containing <subtring>"""
+    """Repos having notes containing <substring>"""
 
     name        = _('Repositories having notes containing <substring>')
     description = _("Matches repositories whose notes contain text "
diff --git a/src/Filters/Rules/Source/_HasNoteMatchingSubstringOf.py b/src/Filters/Rules/Source/_HasNoteMatchingSubstringOf.py
index 280d016fb..510e5e5f6 100644
--- a/src/Filters/Rules/Source/_HasNoteMatchingSubstringOf.py
+++ b/src/Filters/Rules/Source/_HasNoteMatchingSubstringOf.py
@@ -38,7 +38,7 @@ from Filters.Rules._HasNoteSubstrBase import HasNoteSubstrBase
 # "Events having notes that contain a substring"
 #-------------------------------------------------------------------------
 class HasNoteMatchingSubstringOf(HasNoteSubstrBase):
-    """Sources having notes containing <subtring>"""
+    """Sources having notes containing <substring>"""
 
     name        = _('Sources having notes containing <substring>')
     description = _("Matches sources whose notes contain text "