- Father of director Sidney Lumet. Former father-in-law of Gail Lumet Buckley. Grandfather of Amy Lumet and Jenny Lumet. Former grandfather-in-law of P.J. O'Rourke. Great-grandfather of Jake Cannavale.
- Was an acting coach to a young Jayne Mansfield before she entered films.
- He appeared in two films directed by his son Sidney Lumet: Le prêteur sur gages (1964) and Le Groupe (1966).
- Leading actor of the Yiddish theatre.
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