Feinstein was born Dianne Emiel Goldman[1] in San Francisco, to Betty (née Rosenburg), a former model, and Leon Goldman, a surgeon. Feinstein’s paternal grandparents were Jewish emigrants from Poland, while her maternal grandparents, the Rosenburg family, from Saint Petersburg Russia, were of Jewish or German ancestry,[5][6] but were of the Russian Orthodox faith.[7][5]
I read all that. I’ll bet Diane Feinstein has never joined a synagogue. It seems that all three of her husbands were Jewish.
____
Dianne’s mother’s family, the Rosenburgs, had a more distant relationship with Judaism. Some of them belonged to the Russian Orthodox church.
She attended a Jewish religious school, but later enrolled at the Convent of the Sacred Heart, a prestigious private Catholic high school, in accordance with her mother’s wishes. At that time she met California Attorney General Edmund (Pat) Brown, the father of a classmate. The teenaged Feinstein impressed Brown with her interest in political life. After Brown was elected governor of California, he sought out Dianne and gave her a job as an advocate for prison reform.
After graduating from Sacred Heart (the first Jew to do so), she entered Stanford University, where she excelled academically and became actively involved in politics.
http://jwa.org/encyclopedia/article/feinstein-dianne