Was John Ritter Jewish

Answer 1

No, he was the son of singing cowboy Tex Ritter and actress Dorothy Fay, both of whom were non-Jewish Protestants. See more at the J-Weekly Article in the Related Links below.

Furthermore, John Ritter's wife, Amy Yasbeck, explicitly stated neither she nor John Ritter were Jewish in an interview with Melissa Parker for Smashing Interviews Magazine:

"September to us meant we were going to reassess and go forward and check ourselves. We weren't Jewish but the Jewish Holy Days of reflection and remembrance are in September. We didn't know that. That works for me. I get that. We all turned a year older, school starts, and things are new. September has become its own kind of month, where it's okay to feel off balance even though days of remembrance and joy are happening." See more at the Smashing Interviews Articles in the Related Links below.