Thierry III de Montbelliard

Thierry III's father was II, Count of Mouson *Thierry\Thibaud and his mother was *Ermentrude\Ermenson de Bourgogne.  His paternal grandparents were *Louis II , Count de Mouson and *Sophia , Countess de Bar-le-Duc; his maternal grandparents were *Guillaume I , le Grande Count de Burgundy and *Etiennette de Longwy. He had a brother named *Renaud I , Count.