My grandfather Giovanni Oliver and his sister Clara came to America in the 20's. Their parents were Vicenzo and Regina(De Marco.) Numerous other Olivier's came over during the 20's from Belluno. I am trying to find out how they are all related. Some of the others were Giacomo, Giovanna, Beniamino, Vergilio, Fioravante, Emilio, Caterina, Angelina, Luigi, Umberto, Marino, Antonio, Futunato, Agostino, Aurelio, Augusto, Amabalino, and Primo. I think that most are sibling and cousins.