I guess the worst would be Hitler or Staline
I heard a show about people with unlucky names
I'll translate them the best that I can: the names have meaning in french.
Mr. Salope (Mr Bitch (not in the dog sense but the insult meaning))
Mr. Mortdesoif (Mr Dead by thirst (each time the cops stopped his car he was nearly arrested because the thaught he was having a piss and/or was drunk)
Mr Cocu (Mr MyWifeCheatedOnMe)