I found two female ancestor's whose spouses were settled in New York before they arrived in the US. Both had children, but when they immigrated they used their maiden names. For example, Liboria Savoia (nee Piscitello) arrived in 1898 from Vallelunga, Sicily with Giuseppe, Rosaria, and Michele and went to New York City to be with her husband Vincenzo Savoia. Her name on the manifest is listed as Liboria Piscitello and the children as Savoias. Concetta DiGiovanni (nee Savoia) arrived in 1905 from Vallelunga with Cosima and Lorenza and went to Falconer, NY to be with her husband Fred DiGiovanni. Her name on the manifest is listed as Savoia and her children's surname is penciled in as DiGiovanni. Does anyone know why they would use their maiden names?