2/4 200 max bet spread limit

Villain is an old man in his 50s or 60s. No reads on him other than that he has gotten a lot of big hands throughout the session and had them cracked. His stack is about $340

Hero is a has been playing tight aggressive, except for one hand where Villain has seen hero whiff a 3 barrel bluff and lose $500 of his stack to someone. After that, hero has slowly built back to a $1000 stack, winning a couple big pots at showdown.

Hero raises $16 UTG with AcKc
2 other players call, one in MP, other OTB
Villain in BB calls

($59 pot) Flop is 345dd
Everybody checks
Turn is Ah
I accidentally check out of turn because I didn't know villain in BB was in the hand.

He leads for $35
What's his range here?
I re-raise to $80
The two other villains fold.
Villain in BB comes over the top for $280. He has about $50 left behind.

Action to hero? Without reads of him making big moves with draws, is it ever a call here? (Anyone can help me out with the ranges and pokerstoving?)

Raising turn is bad. His lead is very strong. I'd think about folding AK here. Calling at most. Folding to any more bets.

How come his turn bet is very strong here? I think you're right, but what's your thought process about that?

Is it because he's first to act with 3 of us behind and he bets?

When he reraises his range is two pair+ with some chance of AdXd or a combo draw depending on how aggressive he is. Unless villain is super aggressive this is a fold.

I don't see the first bet here as super strong, but betting into 3 villains after the ace hits is not likely a bluff either. His range at that point is AX+ with some chance of having a diamond draw or combo draw. I would usually call but fold if villain bets river big. If villain has been tight and is not likely betting just an ace here, then folding might even be better. Your probably still ahead of some of his range, but not much.

I think I fold to the initial turn bet. When you check flop, it looks exactly like AK or AQ to most villains here. Despite this, an older tighter player leads into you and 3 others. As played, obvious fold to the 3 bet.