[pcottraux]

"Weird Al is pretty funny, amazing that his father was a famous polka musician."

Actually, Weird Al was not related to the famous polka musician, but I think they were friends.

Al's real parents died via carbon dioxide poison, I think. They had a fire one night but forgot to close the chimney flue. They were found dead the next morning.

[Brainhose]

This myth has been busted:
From Al's official site;
Q: Is Al related to the famous accordion-playing Polka King, Frankie Yankovic? A: No, although they were friends for many years. (In October 1998, Frankie passed away at his home in Florida at the age of 83.)

An urban legend busted! Thanks