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:

• Eberhard I, Count of Bonngau, count in Zülpichgau [de] and in Keldachgau,
• Hermann I, Archbishop of Cologne (890–924), Chancellor of King Zwentibold of Lorraine,
• Ermenfried.

This article does not cite any sources. (December 2009)