I was curious whether Isner might be Jewish based on his last name, but a quick Web search answered that question.
On Isner's personal website, he answered the following question from a fan:
YOU ARE A GREAT ROLE MODEL, BY ANY CHANCE, ARE YOU OF JEWISH DESCENT?
Submitted by Judith Meyer, Briarcliff, New York
Isner: "I'm glad to hear that you think I'm a good role model, i appreciate that comment. Actually I am not of jewish decent but I get asked that frequently I guess because my last name sounds somewhat jewish."