Eberhard IV of Nordgau
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He succeeded his father in 940 with his brother Hugues d'Eguisheim.
In 959 he submitted to the Holy Roman Emperor, Otto I at Abbey of Lure.
He governed the Nordgau from 940 until 951, when he abdicated in favour of his son Hugues, and withdrew to his territory of Altorf where he died in 972 / 973.