The Vita Sancti Deicoli names "primogenitus Heberardus, secundus Hugo, tercio Guntramnus" as the three sons of Hugo.
Graf im Nordgau 959/67. "Otto…rex" granted property "Luterhaa" which he received from "filiis Hugonis Heberhardo et Hugone" to Kloster Alanesberg by charter dated 6 Apr 959. "Otto…imperator augustus" confirmed donations of property "de locis Ozenheim, Tetingen…in pago Moiinegouwe in comitatu Eberhardi comitis" by "nobis nepos et equivocus noster Otto dux Sweuorum" to "sancti Petri Ascaffaburg" by charter dated 29 Aug 975, although it is not known whether this refers to the same Graf Eberhard. 1
Also called Cte Eberhard IV D' ALSACE-INFERIEURE.