Looking for Piereni Family IN Italy

My Great Grandmother's name was Guistina Piereni Morelli. She was married to Thomas Morelli. They had six children; three girls and three boys. The boys names were Arthur, Ernesto and Oresto. The girls names were Aduina and Argentina who married Ottavio Nannini. I do not know the name of the other daughter. Arthur, Ernesto and Argentina came to the States. They all settled in California. The rest stayed in Italy. Thomas ran away to Brazil and started another family.