All I know about my granmother's (Carmela Sica, still alive and living in Monteleone di Puglia and too old to remember)side is that her parents were Giovanni Sica and Concetta?
She had 3 brothers, Joseph Sica and the other two Rocco and Vincenzo Sica apparently had a different mom. My grandma, Carmela Sica married Ernesto Grella and their children are Antonio, Pasquelina, Francesca, Michela (my mom) Lorenzo and Maria who died as a child. Carmela and Ernesto lived in the Puglia were the had and raised their children but were they came from we do not know.