The name Monty is a boy's name . Monty and is often added to lists like Old Man Names and discussed in our forums with posts like "Picky Parents BNG".
From the experts:
Monty, a name with a World War II feel, is rarely used on its own. But we're hearing rumblings of a comeback and think that Monty, whatever it's short for, is an adorable vintage nickname name of the future.