Erenfried I of Maasgau was the count of Bliesgau, Keldachgau [de], Bonngau [de], 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: