They are not related; in fact, "Kaye" is a pseudonym for both men. Danny's real name at birth was David Daniel Kaminski, and Thorsten's real last name is Kieselbach.
no Danny kaye died in 1987 aged 74. His given name was David Daniel Kaminsky. He died of a heart attack.
He had only one child: Daughter Dena kaye with his wife sylvia
His father, Sidney Gans, was Jewish.
He's not in fact, he was raised in an Italian Roman Catholic family and still considers himself one, his wife is Jewish though.