Hodor

One of the Game of Thrones names with the most in-world significance: its origin and meaning were revealed in the pivotal season 6 episode "The Door." It's also one of the more memorable names on the show, given that it's the only word its bearer, the friendly half-giant Hodor, ever says. That said, it's hard to imagine anyone using it as a baby's first name.

Pronounced HOH-dor.