Jason's Alexander's real name

Mulva, It is Jay Greenspan I think

Yes, Jay Scott Greenspan. His mother always called him Jason (as in "Jay-my-son"), and he wanted to be Jason Scott in the union, but they already had one. He thought that his father might not be too pleased about him dropping his last name, so he used his father first name - Alexander - instead.

Michael Alexander

You sure it wasn't "Cosmo"? (Sorry that was Michael Richards).

Jason is an incredible multi-talented actor and singer. Seinfeld fans will get a kick out of his performance in "Love, Valor, Compassion", where, despite his physical attributes, he never once has you thinking of the George character, even for a second!

Peace