If your research is PRE 1900 (or so) New Jersey, the Department of State of New Jersey offers some searchable databases on line. These focus on early colonial and 19th century records. I see a lot of availability and duplication of those records, but HERE IS A GEM! (Link above!)
Legal Name Changes, 1847-1947 may be of some help for researchers focusing on the great age of immigration. You'll find a lot of "ethnic" surnames made shorter or made easier to pronounce or gone Anglo here: Italians, Poles, and Hungarians doing major changes. Some of these however, may just be about adoption, divorce, or not wanting to be associated with bad news relatives.
https://wwwnet1.state.nj.us/DOS/Admin/ArchivesDBPortal/NameChanges.aspx
I love searchable databases THAT RESPOND TO FIRST NAMES as well as surnames like this one Also consider what an ethnic name in another language may translate to in English when you search. Francis, Franko, etc became Frank.
