For the names, I'm partial to Avant. Somehow it seems in my opinion better than the others.
If I may give a suggestion on names, a common name might be unique if it's written or pronounced in a different way. For example, Brian can be spelled as Bryan or Brien as well.
I was born of a difficult last name to pronounce (at least in the States), and having a hard to pronounce last name is definitely annoying. I personally wouldn't choose anything with a "y", unless it's a well-known name (Ally, etc.).
Just my 2 cents, and once again, congragulations!