Louie is a great name. My Labs are named Bosco (white/yellow) and Chester (black). It took us awhile to name Bosco. We rescued Chester when he was a year old, so he was already named. Good thing we like his name. Both the names really suit each other. I think that is the key, they have to suit the name you give them. Growing up I had a Miniature Schnauzer named Harold.
It can be tough to name a pet, just list off a bunch of names and see what works best.
Chiceh