Lyanna Mormont is the daughter of Maege Mormont. She was named for Lyanna Stark, who died years before she was born. After her mother's older brother Jeor joined the Night's Watch and his only son Jorah exiled to Essos, Maege Mormont became Lady of Bear Island. When Maege left to fight in the War of the Five Kings, Lyanna ruled Bear Island in her mother's stead, eventually taking Maege's place upon her death in combat.