50 NL, JJ on Button after two limpers and a raise

Hero, Villain 1, 2 have full stacks, villain 3 has half stack.

Villain 1: 37/2 over 55 hands
Villain 2: 24/2 over 24 hands
Villain 3: 27/5 over 42 hands

Dealt to Hero on Button [Jc Js]
3 folds
Villain 1: calls $0.50
Villain 2: calls $0.50
Villain 3: raises $1.50 to $2
Hero: calls $2
2 folds
Villain 1 calls $1.50
Villain 2 calls $1.50
*** FLOP *** [4d 5h 9s]
2 checks
Villain 3 bets $3.50
Hero?

Maybe should have raised the flop to isolate, but I was thinking that I could flat here with position. Any comments about Villain ranges here?

Just 3bet/get it in preflop vs/ the half stack. As played I would call, villain can have 88-AA, AJ+ and some other crap probably (I know he's only got 5% pfr but the sample is small and fish do weird things.) Calling also gives the othe fish a chance to call with worse, although that's not great because there's a lot of cards which we aren't happy to see on the turn. I still prefer calling over raising this flop though..