Baldwin II, Count of Boulogne
Baldwin II of Boulogne was a son of Arnulf III, Count of Boulogne, whom he succeeded as count of Boulogne.
Reginar IV, Count of Mons
Reginar IV, Count of Mons( c. 950–1013) was the son of Reginar III, Count of Hainaut.
Lambert I of Leuven was his brother.
Odo V
Odo V was Count of Troyes and of Meaux, including Vitry-le-François, from 1089 to his death, in 1093.
Son of Theobald III and Adele of Valois, he was succeeded by his younger brother, Hugh, Count of Champagne.
Blanche of Navarre, Duchess of Brittany
Blanche of Navarre( 1226 – 12 August 1283), also known as Blanche of Champagne, was the daughter of Theobald the Troubador, King of Navarre and Count of Champagne, and his second wife Agnes of Beaujeu.
She was a member of the House of Champagne.
By her marriage to John I, Duke of Brittany, she became Duchess consort of Brittany.
Hugh IV, Duke of Burgundy
Hugh IV of Burgundy( 9 March 1213 – 27 or 30 October 1272) was Duke of Burgundy between 1218 and 1272.
Hugh was the son of Odo III, Duke of Burgundy and Alice de Vergy.
Theobald III, Count of Blois
Theobald III of Blois (French: "Thibaut")
(1012–1089) was count of Blois, Meaux and Troyes.
He was son of Odo II, Count of Blois and Ermengarde of Auvergne.
Henry III, Count of Gorizia
Henry III, Count of Gorizia( 1263- 1323) was a member of the Meinhardiner dynasty.
Herbert II, Count of Vermandois
Herbert II( died 23 February 943), Count of Vermandois, Count of Meaux, and Count of Soissons.
He was the first to exercise power over the territory that became the province of Champagne.
Scholastique of Champagne
Scholastique of Champagne( 1172–1219) was the daughter of Marie, Countess of Champagne and Henry I, Count of Champagne.
Alice of Vergy
Alice( or Alix) de Vergy( 1182–1252) was duchess consort of Burgundy as the second spouse of Odo III, Duke of Burgundy.
She was the regent of Burgundy during the minority of her son 1218 – 28.
Alice was the daughter of Hugh, Lord of Vergy, by Gillette de Trainel.
In 1199, she married Odo III, Duke of Burgundy.
Their children were:

Question: Who is the paternal grandfather of Odo V?