Family names weren’t changed at Ellis Island. See eg this from the New York Public Library: https://www.nypl.org/blog/2013/07/02/name-changes-ellis-island http

Family names weren’t changed at Ellis Island. See eg this from the New York Public Library: https://www.nypl.org/blog/2013/07/02/name-changes-ellis-island https://www.nypl.org/blog/2013/07/02/name-changes-ellis-isla... (The mandated adoption of surnames is a pretty complex topic and of course proceeded in different ways in various times and places.)