In the A Song of Ice and Fire novels, Lothar Frey is often referred to as "Lame Lothar", on account of his crippled leg, and serves as the Steward of the Twins. He is the twelfth son of Lord Walder Frey, the first from his marriage to his fourth wife, Lady Alyssa Blackwood.
Lothar is described as plump, with close-set eyes, a pointed beard, and dark hair in ringlets to his shoulders. His leg was twisted at birth. Despite his handicap, he is intelligent, cunning, and well-spoken.