Reuven Feinstein is the youngest of the four children of Rabbi Moshe and Shima (Sima) Feinstein and the only one to be born in America. His older siblings — Faye Gittel (deceased), Shifra (deceased), and
Dovid (deceased) were all born in
Lyuban, Russia (now part of Belarus), where Rabbi Moshe was the city's Rav until 1937. As did his late brother
Dovid Feinstein, he upholds their late father's stance against an
eruv for Manhattan.{{cite news |newspaper=
The New York Times ==Personal life==