--- ./hgext/convert/__init__.py.orig	2014-08-01 23:22:55.000000000 +0000
+++ ./hgext/convert/__init__.py	2014-08-17 09:14:36.000000000 +0000
@@ -27,6 +27,7 @@
     ('d', 'dest-type', '', _('destination repository type'), _('TYPE')),
     ('r', 'rev', '', _('import up to source revision REV'), _('REV')),
     ('A', 'authormap', '', _('remap usernames using this file'), _('FILE')),
+    ('', 'authormapsuffix', '', _('append this suffix to remapped author names'), _('SUFFIX')),
     ('', 'filemap', '', _('remap file names using contents of file'),
      _('FILE')),
     ('', 'splicemap', '', _('splice synthesized history into place'),
--- ./hgext/convert/convcmd.py.orig	2014-08-01 23:22:55.000000000 +0000
+++ ./hgext/convert/convcmd.py	2014-08-02 06:58:26.000000000 +0000
@@ -103,12 +103,15 @@
         self.commitcache = {}
         self.authors = {}
         self.authorfile = None
+        self.authormapsuffix = ''
 
         # Record converted revisions persistently: maps source revision
         # ID to target revision ID (both strings).  (This is how
         # incremental conversions work.)
         self.map = mapfile(ui, revmapfile)
 
+        if opts.get('authormapsuffix'):
+            self.authormapsuffix = opts.get('authormapsuffix')
         # Read first the dst author map if any
         authorfile = self.dest.authorfile()
         if authorfile and os.path.exists(authorfile):
@@ -360,7 +363,7 @@
                 continue
 
             srcauthor = srcauthor.strip()
-            dstauthor = dstauthor.strip()
+            dstauthor = dstauthor.strip() + self.authormapsuffix
             if self.authors.get(srcauthor) in (None, dstauthor):
                 msg = _('mapping author %s to %s\n')
                 self.ui.debug(msg % (srcauthor, dstauthor))
@@ -374,7 +377,7 @@
 
     def cachecommit(self, rev):
         commit = self.source.getcommit(rev)
-        commit.author = self.authors.get(commit.author, commit.author)
+        commit.author = self.authors.get(commit.author, commit.author + self.authormapsuffix)
         # If commit.branch is None, this commit is coming from the source
         # repository's default branch and destined for the default branch in the
         # destination repository. For such commits, passing a literal "None"