Luca - Not bad but I prefer Luke
Jaco - "Jayco" is a caravan company, and also I doubt anyone would know how to pronounce it so he'd constantly be correcting people who call him Jacko.
Jake - Not bad.
Jace - Don't really like it, I prefer Jason.
Ryder - Like it
Asher - Not bad, but sounds a bit feminine to me.
Zane - Like it.
Hunter - Not bad
Leo - Like it.