The name Mont is a boy's name meaning "mountain". Mont and discussed in our forums with posts like "Quick Question Thread?!".
From the experts:
Monty Burns, on The Simpsons, smashed to pieces any goodwill for his first name leftover from Monty Python. But if you drop the "y," you're left with a distinctly Gallic sounding nickname name. If it feels to slight for the birth certificate, there are tons of ways to get to it as a nickname: Montgomery, Montana, Montreal, even Montmorency.