Erard of Bar, Seigneur de Pierrepont et d'Ancerville
Erard of Bar, (French: Érard de Bar) was a monk by 1292 and then seigneur de Pierrepont
et d'Ancerville by 1302.
Erard was one of eight sons born to Theobald II, Count of Bar and his wife, Jeanne de Toucy.
He married Isabella of Lorraine
(d. 12 December 1353), daughter of Theobald II, Duke of Lorraine, and Isabelle de Rumigny; they had had six children.
Erard died in 1335 at Pierrepont, France.
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.
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:
Elisabeth de Bar
Elizabeth of Bar also known as Elisabeth( Isabel) de Bar- Pierrepont, was born circa 1345 at Hagestein, Zeeland, Netherlands.
She was the youngest daughter of Theobald de Bar, Seigneur de Pierrepont and his wife Marie de Namur.
When her father, Theobald, died between 2 August 1353 and 6 July 1354.
And because he had no legitimate male heir, she became the heiress of Bar- Pierrepont.
She married Otto, Lord of Arkel, son of John IV, Lord of Arkel and Irmengard of Cleves, somewhere before 18 October 1360.
They had one son, John V, Lord of Arkel, born on September 11, 1362 in Gorinchem.
Elisabeth died before 11 May 1411 at Pierrepont, France.
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.
Margaret of Bar
Margaret of Bar( 1220–1275) was a daughter of Henry II of Bar and his wife Philippa of Dreux.
She was Countess of Luxembourg by her marriage to Henry V of Luxembourg.
She is also known as" Marguerite of Bar".
Theobald of Bar, Seigneur de Pierrepont
Theobald of Bar( French: Thibauld/ Thiebaut de Bar), Seigneur of Pierrepont.
He was one of six children born to Erard of Bar, Seigneur de Pierrepont et d'Ancerville( himself son of Theobald II of Bar), and Isabelle of Lorraine( daughter of Theobald II, Duke of Lorraine).
In 1340, he married Marie de Namur( daughter of John I, of Dampierre and Marie of Artois), after her first husband Henry II, Graf of Vianden was murdered at Famagusta three years before.
His wife, Marie gave birth to two daughters, Yolande and Elisabeth.
When Theobald, died( between 2 August 1353 and 6 July 1354) he had no legitimate male heir, thus his daughter Elisabeth became the heiress of Bar- Pierrepont.
Erard II of Chacenay
Erard II( died 16 June 1236) was the Sire de Chacenay( Chassenay) from 1190/ 1.
He was the eldest son of Erard I of Chacenay and Mathilde de Donzy.
Marie de Namur
Marie of Namur, also known as Marie de Namur or Maria van Dampierre.
Her titles were" Gräfin von Vianden", from her first marriage and" Dame de Pierrepont", from her second marriage to, Theobald of Bar.
Born in 1322 to John I of Namur and his wife Marie of Artois.
She had three sisters, including Blanche of Namur, Queen consort of Sweden and Norway, and seven brothers.
In 1335/ 36, she married her first husband, Henry II, Graf of Vianden, son of Philip II, Graf of Vianden and his first wife Lucia von der Neuerburg.
Henry was murdered at Famagusta in September 1337.
In c. 1337, she gave birth to Maria of Vianden her first daughter from her marriage to Henry II, Graf of Vianden.
Her second marriage in 1340( dispensation 9 September 1342) was to her father's second cousin, Theobald of Bar, Seigneur de Pierrepont, son of Erard of Bar, Seigneur de Pierrepont et d'Ancerville( himself son of Theobald II of Bar), and his wife Isabelle of Lorraine( daughter of Theobald II, Duke of Lorraine).
This marriage produced two daughters, Yolande de Bar( b. c 1343 – d. c 1410) and Elisabeth de Bar( b. c 1345 – d. before 11 May 1411).
Marie died somewhere before 29 October 1353/ 57.
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.

Question: When was Erard Of Bar, Seigneur De Pierrepont Et D'Ancerville's father born?