THIERRY de Lorraine (-30 Dec 1115). The Notitiæ Fundationis Monasterii Bosonis-Villæ records the succession of "dux Theodericus puer parvulus Gerhardi ducis filius"[10], although, considering the estimated birth date range of his mother, Thierry must have been adult when his father died. He succeeded his father in 1070 as THIERRY II Duke of Lorraine, opposed by his brother to whom he ceded territories which became the county of Vaudémont in Apr 1073 after waging war for two years. Weakened by this conflict, Louis Comte de Mousson claimed the title duke from Duke Thierry. "Hadewidis ductrix" founded the abbey of Châtenois by charter dated to after 1075, confirmed "post obitum ductricis Hadewidis" by "dux Theodericus filius eius"[11]. During the investiture crisis, Duke Thierry supported Emperor Heinrich IV who enabled him to take control of Metz after expelling Hermann Bishop of Metz[12]. Emperor Heinrich V granted him the title "Marquis" in [1114][13]. The Obituaire de Saint-Mansuy records the death "30 Dec" of "Theodoricus dux"[14]. m firstly ([1080]) as her second husband, HEDWIG von Formbach, widow of GERHARD von Süpplingenburg Graf im Harzgau, daughter of FRIEDRICH Graf von Formbach & his wife Gertrud von Hadmersleben (-[1090/93]). According to Poull, Duke Thierry unsuccessfully petitioned the Pope in early 1079 to marry Agnès d'Aquitaine, widow of Pierre Comte de Savoie, which if correct means that his first marriage inevitably took place after this[15]. m secondly (Han-sur-Lesse 15 Aug 1095) as her second husband, GERTRUDE de Flandre, widow of HENRI III Comte de Louvain, daughter of ROBERT I "Friso" Count of Flanders & his wife Gertrud of Saxony [Billung] (-[1115/26]). Her parentage and both her marriages are deduced from the Cartulaire de Saint-Bertin in which is named "Gertrude filia Roberti Frisonis, vidua Henrici Bruselensis" mother of "Theodericum" who is in turn named "filium Theoderici ducis de Helsath"[16]. The Genealogica Comitum Flandriæ Bertiniana specifies that "Robertus comes cognomento Frisio" had three daughters "tercia Theoderico comiti Alsatie [nupsit]"[17]. Duke Thierry II & his first wife had three children