His mother, Anna, later married a man named Sebastien Ipcher, from whom Jean got his surname, a French-Catholic variation of "Ipcher" or "Ipchier".
Njegova majka, Anna, kasnije se vjenčala sa čovjekom koji se zvao Sebastien Ipcher, od koga je Jean dobio prezime, francusko-katolička verzija prezimena "Ipcher" ili "Ipchier."