FREDERIC, son of WIGERICH [III] Graf [von Bidgau], Pfalzgraf & his wife Cunigonde --- ([910/15]-[Jun/Jul] 978). Duke Frederic's parentage is deduced from the charter of "Otto…imperator augustus" dated 3 Jun 960, under which property was donated to Kloster St Petrus at Metz and which names "compater noster Adalbero…sanctæ Mettensis ecclesiæ presul [et] germano suo Friderico duce"[105], read together with the diploma of Charles III "le Simple" King of the West Franks which granted the abbey of Hastières to the church of Liège which names the parents of Adalberon[106]. "Friderici, Gisilberti, Sigeberti fratrum predicti Gozlini" subscribed the charter dated 943 which refers to "Gozlines…miles…ex nobilissimis regni Chlotarii ducens prosapia" and the donation by "uxor eius Uda et filius eius…Regingerus" to St Maximin at Trier[107]. He constructed the château de Bar on land inherited from his wife, triggering protests from Louis IV King of France to Otto I King of Germany (the former considering the area within his sphere of influence) and from the Bishops of Toul (who considered that part of the land belonged to one of his churches)[108]. Bruno Duke of Lotharingia, brother of Otto I King of Germany, to whom the latter had granted Lotharingia in 953, created the duchy of Upper Lotharingia in 959 and appointed Frédéric as FREDERIC I [associate] Duke of [Upper] Lotharingia. From the death of Duke Bruno in 965, the duchy was held under the direct authority of Emperor Otto I and his successors. Duke Frédéric attended the grand assembly of nobility and clergy convoked by the emperor at Köln 2 Jun 965[109]. "Fredericus…Lothariensium Dux" confirmed donations of property at Murecourt to Bouxières by charter dated 26 Oct 966, signed by "Teutberti comitis, Lictardi comitis, Widonis comitis…"[110]. The Franco/German dispute over Lotharingia and Bar was pursued by Lothaire King of France who fought lengthy campaigns to recapture Lotharingia, culminating in the invasion of 978, the capture of Aachen, and the siege of Metz, although the French were forced to retreat by Otto II King of Germany[111]. The necrology of Fulda records the death in 978 of "Fridurih dux"[112].
m (betrothed 951, [10 Sep/12 Nov] 954) BEATRIX de France, daughter of HUGUES "le Grand" Duc des Francs & his third wife Hedwig of Germany ([938/39]-23 Sep 1003).Flodoard refers to "Hugonis principis filiam" marrying "Fredericus, frater Adalberonis episcopi" in 954[113]. The Gesta Episcoporum Virdunensium names "Beatricis, Hugonis Capitonis Francorum regis sororis" as wife of "ducis Frederici"[114]. The Chronicle of Alberic de Trois-Fontaines names "sororem [Otto filiusHugo rex…dux Burgundie]…Beatricem" as wife of "Fridericus dux Mosellanorum"[115]. "Otto…imperator augustus" made donations to Notker Bishop of Liège by charter dated 15 Jun 983 which names "Mettensium episcopus Theodericus noster consanguineus et illustris dux Beatrix nostra consobrina[116]. "Otto…rex" confirmed the donation to the bishopric of Toul of the abbeys of St Dié and Moyenmoutier by "Friderico duce cum coniugesua Beatrice nepte nostra" dated 984, recording that Duke Frederic was then deceased[117]. Beatrix acted as regent of Upper Lotharingia for her son Duke Thierry I from 978 to 987, andtook an active part in the government of the duchy. Sheintervened with her brother Hugues Capet over the capture of her son by French troops during the siege of Verdun in 985, and actively attempted to resolve the Franco/German conflict over Lotharingia by diplomatic means. She was imprisoned in an abbey by her son, who was impatient to assume personal rule but was obliged to release her by the Pope. She visited the monastery of Saint-Dié in 1003 with her family[118].
Duke Frederic I & his wife had three children