From the experts:
Stark is an ancient surname derived from the Old English word stearc, meaning firm and unyielding. In modern parlance, stark means severe or plain. But Stark's use as a first name -- 21 boys were named Stark in the US in 2013 -- stems from its prominence in Game of Thrones, which has inspired so many new baby names. House Stark is a ruling family on GoT; its motto is fittingly "Winter is coming." As a first name, Stark is strong, straightforward, yet a bit, well....stark. Though we doubt it will be the next Arya (a member of House Stark), Stark will undoubtedly grow in usage as a first name along with the popularity of the show and books.