Hi Jim,

There were many U.S. ports of entry.  Ellis Island was a large and well known one, but hardly the only port entered through by immigrants.

Try searching your ancestor's name at this free site:
www.familysearch.org
It contains many genealogical databases, and records of many U.S. port manifests.

This page from Family Search shows info on various U.S. ports, including usage numbers.
https://www.familysearch.org/wiki/en/US_Immigration_Passenger_Arrival_Records

Also, remember that the manifest handwriting can be hard to read, and names sometimes were transcribed into the on-line index incorrectly.  Try doing a non-exact search on surname if you don't find it right away.

It also helps if you know the immigrants Hebrew or Yiddish first name.

Good luck in your search,

Sherri Bobish
Princeton, NJ