Erenfried I of Maasgau was the count of Bliesgau, , , 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 and in Keldachgau, Hermann I, Archbishop of Cologne (890–924), Chancellor of King Zwentibold of Lorraine, Ermenfried.
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