Aww, he's such a cutie!!!!!
The boy Chihuahua I had (he belongs to my grandparents now) was named TANK, and it was so adorable because he was so little.
I think the name Martini is really cute.... He looks like that would fit him.
*Suggestion from a chihuahua owner.... Make sure you socialize him A LOT while he is a puppy. Have him around lots of people (and lots of other dogs if possible). These dogs get VERY set in their ways VERY quickly... But if they get used to lots of people at a young age, they will be just the sweetest things ever. At least, that's what I did with my little Madison, and she LOVES people and is never skiddish around humans.