Renaud I the Borgne, born around 1080, died March 10, 1149 in the Mediterranean Sea, was Count de Bar and Lord of Mousson from 1105 to 1149 and Count of Verdun from 1105 to 1134. He was the son Thierry, Comte de Montbéliard, Altkirch, Ferrette and Bar, and Ermentrude of Burgundy.
In 1102, he became solicitor of the Abbey of Saint-Pierremont. At his father's death, he won the County Bar and Mousson share. The Bishop of Verdun also entrusted him with the county of Verdun. He was often in conflict with the bishop, being too powerful to be a vassal of the latter, to the point where it was tabled several times in the county of Verdun and finally abandoned in 1134.
During the quarrel of investitures, it was in favour of the pope and fought the Bishop of Verdun, a supporter of the emperor. In 1113, Emperor Henry V is involved in the fight, takes the Castle Bar and captured Renaud. It will not be released until they have sworn loyalty and lent tribute.
He fought to expand its field Meuse seeking to reclaim the legacy of the Meuse Godfrey the Hunchback. He obtained Stenay Mouzay and of the Bishop of Verdun in 1100, then Briey to 1130. In 1134, abandoning its rights in the county of Verdun, he receives Clermont-en-Argonne. Godefroy de Bouillon Bouillon had assigned to the bishop of Liege stating that if returned to the Holy Land, it may redeem the lordship, and allow this option to his heirs. Renaud, posing as heir, claimed the city and, to the refusal of the bishop, took by storm in 1134. He had, however, make it in 1140. He seems to have been on good terms with its neighbour Simon Ier.
Since 1128, he had hoped to cross, but his in the various concerns had prevented. He embarked upon the second crusade with his sons and Thierry Renaud, and died during the trip.
On the one unknown first wife, he had a son who was born in 1113 and died before 1120.
He remarried in 1120 with Gisèle of Vaudémont (1090 † 1141), widow of Fox III, Count of Toul, daughter of Gerard I, Count of Vaudemont, and of Hedwige Dagsbourg and had:
* Hughes (1141)
* Agnes, married to 1140 (1163), Count de Chiny
* Clemence married to 1140 (1070 1162), then Thibaut III, sire of Crépy
* Renaud II (1115 1170), Count of Bar
* Thierry († 1171), the 54th bishop of Metz
* Matilda, married to Conrad I, Count of Kyrbourg
* Stephanie, lady of Commercy, married to Hughes III, sire of Broyes
Renaud de Bar I 
