Any word that is synonymous with last or ultimate will do.
The name Lewis is a surname for some Jewish families but it is also a surname for some non-Jewish families.
Zimmer can be a surname used by Jewish families, but it can also be a surname used by Christian families with a German cultural background.
Certainly there are families with the Vargas surname.
Surnames don't have family crests; families have family crests. For any given surname there can be several unrelated families, each with a different crest, and many more unrelated families with no crest at all.
Many different families using the surname Thomas came to America at different times. A more specific answer would require more specific information about the particular Thomas family of interest.
Davison is a contraction of the surname "Davidson." It means literally "son of David" in reference to someone in the bloodline having the name David and giving his offspring a surname reflecting that.
Amaravadhi surname predominantly belongs to Velama caste but some of the Kamma and Vyshya families also have this surname
Halvey can be used by Jewish families, but not all families named Halvey are necessarily Jewish.
Please be more specific.
Sorry, my sources indicate no such surname - Please be more specific.
Brassaw is really the surname Bourassa and the families are from Quebec. When French speaking families moved to English speaking communities the name was recorded in the way the receiver heard the name.
Please be more specific.