The BICCIO family is original of Custoza (Verona - Italy). Paolo BICCIO had at least a son, Bartolomeo BIZIO. Bartolomeo Bizio came to Venice and married Maria GRADENIGO. In Venice there were two branches of the GRADENIGO family: the branch GRADENIGO of S. Giustina and the branch GRADENIGO of Rio Marin. Maria belonged to the branch of S. Giustina that today alone does not exist more. The GRADENIGO family of the Rio Marin branch still exists. Some descendands of Bartolomeo BIZIO and Maria GRADENIGO carried the double last name BIZIO GRADENIGO. Consequently in Italy there are the families BIZIO, GRADENIGO and BIZIO GRADENIGO.