Gallaghers
Descendants of Kevin Gallagher, The Gallaghers are a difficult group of time traveling criminals to classify, because they stem from twins; Wilem Alan Gallagher, and Padraig Steven Gallagher. It is likely that sometimes they don't even know themselves which twin they are descended from (or even that the twins are actually two separate people).
Often Impersonate: Bergstrom, Heinrich Von Bergstrom