Birth Name: Jonah Sezzin Platt
Place of Birth: Los Angeles, California, United States
Date of Birth: November 17, 1986
Ethnicity: Ashkenazi Jewish
Jonah Platt is an American actor, writer, singer, and producer.
Jonah is the son of Julie (Beren) and Marc Platt, a producer. His brother is actor and singer Ben Platt. A picture of Jonah and Ben can be seen here.
Jonah’s maternal grandfather was Robert M. Beren (the son of Adolph Beren and Ethel A. Abrams). Adolph was a Jewish immigrant, born in Dankera, Latvia, the son of Wolfe Aaron Beren and Liebe Rashe/Rosa Rothschild. Ethel was born in New York, the daughter of Russian Jewish parents, Samuel G. Abrams and Tillie Sidel.
Jonah’s maternal grandmother was Joan Schiff (the daughter of William Schiff and Rose J.). William was born in Laižuva, Lithuania.
Sources: Genealogy of Jonah Platt (focusing on his mother’s side) – https://www.geni.com
Obituary of Jonah’s maternal grandmother, Joan (Schiff) Beren – http://www.legacy.com