Hildebrand m. Old High German hiltja 'battle' + Old High German, Old Norse brant 'fire, brand'.
The name of an 8th C king of the Lombards, the birth name of an 11th C pope, and the name of a 12th C Italian saint.
The name also appears in Germanic myth as the name of a companion of Theodoric and Odoacer, though this character does not appear to have any basis in history.