Game: The Second Person That Comes To Mind...

Bruce Wayne, of Stately Wayne Manor.

(First thought was of Bruce Dern. How scary is THAT?)
next up…
Karen

Bruce Willis came first; my second Bruce to come to mind was Bruce Dern.

Next name:

Eric

Argh! The pain of simulposting! Ignore mine, Uke got in there first.

No shit…YOU’VE got a Bruce Dern fixation, too?

Well, you beat me that time…

(for the record: Erich Weiss, the birth name of Harry Houdini. First to mind was Eric Idle.)

Karen Black (first was Karen Carpenter).

Next: Maurice

–sublight.

Maurice Gibb
First was Maurice Chevalier
Next name: Oliver

1st: Oliver Stone
2nd: Oliver Wendell Holmes

New name: Randy

Randy Rhodes
first was Randy Travis
Next name: Melvin

Melvin Belvin, from Happy Days.
(First was Mel Gibson, even though I have no idea if the Mel is short for Melvin or not.)

Next: Peter

Peter Tork (Peter Pan was first.)

Next name: Kylie

Kylie Minogue

Next: Ruth

Dr. Ruth. Babe Ruth was first.

Next name: Howard

Howard Jones
Howard Hughes was first.

Next: Grant

Grant Hill

Hugh Grant was first.

Next name: Mark

Mark Hamill. Mark Martin was first.

Jason

Jennifer Jason Leigh. Jason Scott Lee was first.

Next name: Bob

Bob Saget. <first nime Sideshow Bob>

Next up-Marge

Margaret Thatcher (first was Marge Simpson)

Fred