Well, to make a long story short, Jeffrey Tambor is Jewish!
Since Jeffrey Tambor's mother is Jewish, and in Orthodox Judaism and Conservative Judaism, those with a Jewish mother (or those who underwent a halakhic conversion) are considered Jewish, then that makes him Jewish. His father is Jewish too.
Jeffrey Tambor (whose full birth name is Jeffrey Michael Tambor) was born on July 8, 1944 in San Francisco, California, U.S..
He is best known for his roles as Hank Kingsley on The Larry Sanders Show, as well as George Bluth Sr. and Oscar Bluth on Arrested Development.
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