One less syllable to say and a different stress emphasis--SEV--er-in vs. SEV--er--EE--no...Some performers
have changed their names to sound less ethnic: Larry Ziger (King); Gerald Jacoby (Jerry Williams). Harvey
Leonard Moscowitz (IIRC) dropped his last name. So did a certain actor from Long Island named Thomas
Mapother. You've heard of Tom Mapother, haven't you...Tom Cruise Mapother?

Drop that last name,
and it's "Show Me The Money!" time!
Dan brings up a good point about Steve Martorano, whom I do recall. Getting back to dropping ethnic names,
would Jerry Jacoby keep his last name these days rather than convert to the more "American" (?) Williams?
Maybe there's a better ring to it, too; Ja-CO-by...WILL--iams...stress on the first syllable. I would hope
that Jewish performers wouldn't have had to change their names to be successful but it has been done;
"Anglicizing" it. Remember that stand up comic who went on to be an actor and director, Allen Stewart
Konigsberg? You know; "Annie Hall", "Sleeper", "Hannah and Her Sisters"...Then there's comic Jacob
Cohen, who got no respect...no respect at all. Or Melvin Kaminsky ("Blazing Saddles", "Young
Frankenstein"). Mel's wife, Anne (Marie) Italiano, was told to change her last name and she wound
up with "Bancroft".
Performers have their reasons for getting stage names. Would 80s pop music fans have preferred
to go "dancing with myself" with William Broad or with Billy Idol? Stuart Goddard or Adam Ant?
And so many others.
And how about the blues? McKinley Morganfield liked to play in "Muddy Waters" when he was a kid.
"Howlin' Wolf" sounded a bit more interesting than "Chester Burnett". And so on.