Billy Wilder's birth name is Samuel Wilder.
Nicholas Wilder's birth name is Nicholas Layden Wilder.
Billy Drago's birth name is Burrows, Billy Eugene.
Billy Naylor's birth name is William A. Naylor.
Billy Loes's birth name is William Loes.
Billy Patricks's birth name is William Ingoldsby.
Wilder Penfield's birth name is Wilder Graves Penfield.
Bates Wilder's birth name is Christopher Bates Wilder.
Donald Wilder's birth name is Donald Arnold Wilder.
Douglas Wilder's birth name is Wilder, Lawrence Douglas.
Thornton Wilder's birth name is Thornton Niven Wilder.
Nicholas Wilder's birth name is Nicholas Layden Wilder.
Yes, Wilder was Jewish, and his birthplace is now part of Poland (it was in Austria-Hungaria at the time of his birth). His given name was Schmuel (Samuel), and his mother nicknamed him Billy (originally Billie).
Darren Wilder's birth name is Darren Edward Atherton.
Janet Wilder's birth name is Janet Marie Peters.
Margaret Buell Wilder's birth name is Margaret Applegate Buell.
Billy Wilder is 5' 11".
Billy Silva's birth name is Billy Campbell.