Forlong
From Tolkien Gateway
Forlong was the Lord of the lands of Lossarnach, the region to the immediate southwest of Minas Tirith, who was famed for his enormous girth (he was referred to as Forlong "the Fat"). Though he was an old man at the time of the War of the Ring, he rode with two hundred of his men to the aid of the city of Gondor, and lost his life in the Battle of the Pelennor Fields.