diff --git a/src/Handler/Utils/Profile.hs b/src/Handler/Utils/Profile.hs
index ca272d6b8..b115e33d8 100644
--- a/src/Handler/Utils/Profile.hs
+++ b/src/Handler/Utils/Profile.hs
@@ -19,17 +19,20 @@ validDisplayName :: Maybe UserTitle
 validDisplayName (fmap Text.strip -> mTitle) (Text.strip -> fName) (Text.strip -> sName) (Text.strip -> dName)
   = and [ dNameFrags `MultiSet.isSubsetOf` MultiSet.unions [titleFrags, fNameFrags, sNameFrags]
         , sName `Text.isInfixOf` dName
-        , all ((<= 1) . Text.length) . filter (Text.any Char.isSpace) $ Text.groupBy ((==) `on` Char.isSpace) dName
+        , all ((<= 1) . Text.length) . filter (Text.any isAdd) $ Text.group dName
         , dNameLetters `Set.isSubsetOf` Set.unions [titleLetters, fNameLetters, sNameLetters, addLetters]
         ]
   where
     titleFrags = MultiSet.fromList $ maybe [] Text.words mTitle
     fNameFrags = MultiSet.fromList $ Text.words fName
     sNameFrags = MultiSet.fromList $ Text.words sName
-    dNameFrags = MultiSet.fromList $ Text.words dName
+    dNameFrags = MultiSet.fromList $ stripAdd <$> Text.words dName
 
     titleLetters = Set.fromList $ maybe [] unpack mTitle
     fNameLetters = Set.fromList $ unpack fName
     sNameLetters = Set.fromList $ unpack sName
     dNameLetters = Set.fromList $ unpack dName
-    addLetters = Set.fromList [' ']
+    addLetters = Set.fromList [' ', ',', '.']
+
+    isAdd = (`Set.member` addLetters)
+    stripAdd = Text.dropWhileEnd isAdd -- ? Text.dropAround isAdd
\ No newline at end of file
diff --git a/src/Utils.hs b/src/Utils.hs
index f772d155d..5ff061458 100644
--- a/src/Utils.hs
+++ b/src/Utils.hs
@@ -269,7 +269,8 @@ addAttrsClass cl attrs = ("class", cl') : noClAttrs
 -- tickmark :: IsString a => a
 -- tickmark = fromString "✔"
 
--- | remove all Whitespace from Text
+-- | remove all whitespace from Text
+-- whereas Text.strip only removes leading and trailing whitespace
 stripAll :: Text -> Text
 stripAll = Text.filter (not . isSpace)
 
diff --git a/templates/i18n/profile/displayNameRules/de-de-formal.hamlet b/templates/i18n/profile/displayNameRules/de-de-formal.hamlet
index 733c0baab..7be903a79 100644
--- a/templates/i18n/profile/displayNameRules/de-de-formal.hamlet
+++ b/templates/i18n/profile/displayNameRules/de-de-formal.hamlet
@@ -5,5 +5,5 @@ $newline never
     <li>Der angezeigte Name muss vollständig aus Fragmenten des akademischen Titels („#{title}“), des Vornamens („#{userFirstName}“) und des Nachnamens („#{userSurname}“) bestehen.
   $nothing
     <li>Der angezeigte Name muss vollständig aus Fragmenten des Vornamens („#{userFirstName}“) und des Nachnamens („#{userSurname}“) bestehen.
-  <li>Der angezeigte Name darf keine mehrfachen Leerzeichen enthalten.
-  <li>Der angezeigter Name darf keine Sonderzeichen enthalten, die in keinem der Namensbestandteile vorkommen.
+  <li>Der angezeigte Name darf keine mehrfachen Leerzeichen, Kommata oder Punkte enthalten.
+  <li>Der angezeigte Name darf keine Sonderzeichen außer Komma und Punkt enthalten, die in keinem der Namensbestandteile vorkommen.
diff --git a/templates/i18n/profile/displayNameRules/en-eu.hamlet b/templates/i18n/profile/displayNameRules/en-eu.hamlet
index 49da8bd7e..bcc8c7795 100644
--- a/templates/i18n/profile/displayNameRules/en-eu.hamlet
+++ b/templates/i18n/profile/displayNameRules/en-eu.hamlet
@@ -5,5 +5,5 @@ $newline never
     <li>The display name needs to consist entirely of fragments of the title (“#{title}”), the given name (“#{userFirstName}”), and the surname (“#{userSurname}”).
   $nothing
     <li>The display name needs to consist entirely of fragments of the given name (“#{userFirstName}”), and the surname (“#{userSurname}”).
-  <li>The display name may not contain clusters of multiple whitespace characters.
-  <li>The display name may not contain any special characters that do not occur in any part of the name.
+  <li>The display name may not contain clusters of multiple whitespace or punctuation characters.
+  <li>The display name may not contain any special characters that do not occur in any part of the name, apart from dot and comma.