The subject of this article originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
Mathi Stouthand was a male Longbeard dwarf residing in Thorin's Halls. Sometime before the War of the Ring, he was one of the dwarves who participated in Dwalin's expedition to the Dourhands' lands, south of the city. He, along with some of his party fellows, fell ill to a strange disease but was healed afterwards, when a fellow Longbeard brought a cure.