Reginald I, Count of Bar
Reginald I (also called "the One-eyed", Reinald I, Renaud I; – 10 March 1149) was Count of Bar (1105–1149).
Barrois, during the Middle Ages, was the territory of the counts and dukes of Bar, in the eastern part of present-day France, bordering Lorraine.
He was the son of Theodoric I, Count of Montbéliard and Ermentrude of Bourgogne, the daughter of William I, Count of Burgundy.
Reginald's first wife is unknown.
He later married Gisele de Vaudémont, widow of Rainard III, Count of Toul, and daughter of Gérard I, Count of Vaudémont, and his wife Heilwig von Egisheim.
Reginald and Gisele had eight children:
Reginald was one of the leaders of the Second Crusade in 1145.
He was drowned somewhere in the Mediterranean Sea on his return voyage to Europe on or before 10 March 1149.
Reginald I of Bar succeeded Theodoric II of Bar (r. 1092–1105) who was succeeded in turn by Reginald II of Bar (r. 1150–1170) in 1150.
Henry IV, Count of Bar
Henry IV of Bar( abt 1315 – 1344) was count of Bar from 1336 to 1344.
His aunt, Joan of Bar, Countess of Surrey, governed Bar in his name during his minority.
He was the son of Edward I of Bar and his wife Marie of Burgundy.
He married Yolande of Dampierre( died 1395), a granddaughter of Robert III, Count of Flanders.
Henry and Yolande had two sons:
Theodoric I, Count of Montbéliard
Theodoric I  (ca. 1045 – 2 January 1105) was a Count of Montbéliard, Count of Bar and lord of Mousson (as Theodoric II) and Count of Verdun.
He was the son of Louis, Count of Montbéliard, and Sophie, Countess of Bar and Lady of Mousson.
After his father's death, he claimed the estate of the Duchy of Lorraine, which his father had already claimed.
The claim was dismissed by Emperor Henry IV, confirming the duchy to Theodoric the Valiant.
In retaliation, he ravaged the diocese of Metz, but he was defeated by Adalbéron III, bishop of Metz, and the Duke of Lorraine Theodoric the Valiant.
Reconciled with the Church, he founded an abbey in 1074 in Haguenau and rebuilt the church at Montbéliard in 1080.
He did not participate at the Council of Clermont in 1095, or the Crusades, but rather sent his son Louis in the Crusades.
In 1100, the Bishop of Verdun gave the county to Thierry for life, but the relationship between the spiritual and temporal powers was turbulent.
In 1065 Theodoric married Ermentrude of Burgundy (1055–1105), daughter of William I, Count of Burgundy, and Stephanie.
They had the following issue:
Alberic II, Count of Dammartin
Alberic II( died 1183), Count of Dammartin, possibly the son of Aubry de Mello, Count of Dammartin, and Adela, daughter of Hugh I, Count of Dammartin.
What little is known for sure about Alberic II is confounded by the preponderance of noblemen of the same name in both France and England.
What is known that he married Clémence of Bar, daughter of Reginald I “ One- Eyed, ” Count of Bar, one of the leaders of the Second Crusade, and Gisèle de Vaudémont, daughter of Gerard I, Count of Vaudémont.
Alberic and Clémence had one son: Alberic II was succeeded by his son Alberic III as Count of Dammartin upon his death.
The discussion in Aubry, Count of Dammartin, provides some insight into how Alberic III came to claim the countship.
Further complicating the genealogy, Clémence, widowed, married Renaud II, Count of Clermont- en- Beauvasis, her second husband and his second wife.
Renaud and his first wife, Adelaide, Countess of Vermandois, were the parents of Mathilde, wife of Alberic III.
Nocher II, Count of Soissons
Nocher II( d. 1019), Count of Bar- sur- Aube, Count of Soissons.
He was the son of Nocher I, Count of Bar-sur- Aube.
Nocher ’s brother Beraud( d. 1052) was Bishop of Soissons.
Nocher became Count of Soissons, jure uxoris, upon his marriage to Adelise, Countess of Soissons.
Nocher and Adelisa had three children: Nocher ’s son and namesake became Count of Bar-sur- Aube upon his death, and the countship of Soissons reverted to his wife.
His son Renaud would eventually become the Count of Soissons.
Edward II, Count of Bar
Edward II of Bar( 1339 – May 1352) was Henry IV of Bar's eldest son and successor as count of Bar( with Edward's mother Yolande of Flanders ruling as count during his minority, which ended on 10 October 1349).
He had no male issue and was succeeded as count by his younger brother Robert I of Bar.
Theobald II, Count of Bar
Theobald II( 1221 – October 1291) was a count of Bar.
He was the son of Henry II of Bar and Philippa of Dreux.
He became count of Bar when his father was killed during the Barons' Crusade in 1239, but news of Henry's death did not reached him until 1240.
As Theobald was still a minor, his mother ruled as regent until 17 March 1242.
Theobald's own children included his successor Henry III and the bishop Reginald of Bar.
Joan of Bar, Countess of Surrey
Joan of Bar( died 1361) was a French- English noble.
She acted as regent of the County of Bar from 1344 until 1353.
She was a daughter of Henry III, Count of Bar and Eleanor of England, and niece of Edward II of England.
She was unhappily married to John de Warenne, 7th Earl of Surrey.
In 1345, Joan became the regent of Bar for her great- nephew Robert.
Alberic III of Dammartin
Alberic III of Dammartin( Aubry de Dammartin)( – 19 September 1200) was a French count and son of Alberic II, Count of Dammartin, and Clémence de Bar, daughter of Reginald I, Count of Bar.
He married Mathilde, heiress to the county of Clermont and daughter of Renaud II, Count of Clermont.
They had:
Reginald II, Count of Bar
Reginald II of Bar( or)( died 25 July 1170) was a Count of Bar and Lord of Mousson from 1149 till his death.
He was the son of Reginald I, Count of Bar and lord of Mousson, and Giselle of Vaudémont.
In 1135, he attended the Council of Hugh of Metz with his father and brother.
He took part in the second crusade with his father and brother Theodoric in 1147.
His father died during his return.
He reestablished wars against his traditional enemies, the Duke of Lorraine and the bishop of Metz.
He was attacked in 1152, escaped to the Abbey of Saint- Mihiel and was excommunicated.
After that, Reginald had to make amends to have his excommunication lifted.
In 1170, Reginald died, to be succeeded by his eldest son, Henry, as Count of Bar and Lord of Mousson.

Question: What is the date of birth of Reginald I, Count Of Bar's father?
Answer: 1045