Sam

Gilly's baby is a character in the third season. He's a son of Craster, a wildling who marries his daughters, and Gilly, one of his daughter-wives.

Season 3
Gilly's baby is born at the same time the Night's Watch survivors of the Battle of the Fist of the First Men take shelter at Craster's Keep. After Gilly notices she's a boy, she realizes that Craster will want to sacrifice him to the White Walkers.