HEDWIG ([922]-9 Jan [958 or after 965]). Rodulfus Glaber names "sororem [primis Ottonis] Haduidem" as wife of "Hugo dux Francorum cognomento Magnus"[183]. "Henricus…rex" granted property to Paderborn cathedral by charter dated 9 May 935 which names "Heinrici æquivoci ac filii nostri et Hadeuui filiæ nostræ" by charter dated 9 May 935[184]. "Hugues abbé de Saint-Martin" donated "son alleu de Lachy…dans le comté de Meaux", inherited from "comte Aledramnus", to Tours Saint-Martin by charter dated 14 Sep 937 which names "sa femme Havis"[185]. Flodoard refers to "sororem Othonis regis Transfhenensis, filiam Heinrici" as the wife of "Hugo princeps, filius Roberti", without naming her, recording the marriage in 938[186]. The necrology of the abbey of Saint-Denis records the death "V Id Jan" of "Hadhuidis comitissa"[187]. m ([9 May/14 Sep] 937) as his third wife, HUGUES "le Grand" Duc des Francs, son of ROBERT I King of France & his second wife Béatrix de Vermandois ([898]-Dourdan, Essonne Jun 956, bur Saint-Denis).
http://fmg.ac/Projects/MedLands/GERMANY,%20Kings.htm#HedwigMHuguesRegentFrancedied956