Erenfried I of Maasgau was the count of Bliesgau, Keldachgau , Bonngau , and the count of Charmois (fl. 866–904). He married Adelgunde of Burgundy (860–902), a daughter of Conrad II, Duke of Transjurane Burgundy, Count of Auxerre, and Judith de Frioul. They left children: