Question: Who is the paternal grandfather of Hildegarde Of Burgundy?

Knowledge 1: Hildegarde of Burgundy
Hildegarde of Burgundy (–1104) was a French noble, Duchess consort of Gascony and Aquitaine by marriage to William VIII, Duke of Aquitaine.She was the only daughter of Robert I, Duke of Burgundy with his second wife, Ermengarde of Anjou.She was, and by marriage, Duchess of Gascony and Aquitaine.She married William VIII, Duke of Aquitaine; she was his third wife.William and Hildegarde had these children together:William’s birth was a cause of great celebration at the Aquitanian court, but the Church at first considered him illegitimate because of his parents’ consanguinity.This obliged his father to make a pilgrimage to Rome soon after his birth to seek papal approval of his marriage to Hildegarde. [SEP] Knowledge 2: Robert I, Duke of Burgundy
Robert I (1011 – 21 March 1076), known as Robert the Old and , was Duke of Burgundy from 1032 to his death.Robert was son of King Robert II of France and Constance of Arles.His brother was Henry I of France.
Knowledge 1: Hildegarde of Burgundy
Hildegarde of Burgundy (–1104) was a French noble, Duchess consort of Gascony and Aquitaine by marriage to William VIII, Duke of Aquitaine.She was the only daughter of Robert I, Duke of Burgundy with his second wife, Ermengarde of Anjou.She was, and by marriage, Duchess of Gascony and Aquitaine.She married William VIII, Duke of Aquitaine; she was his third wife.William and Hildegarde had these children together:William’s birth was a cause of great celebration at the Aquitanian court, but the Church at first considered him illegitimate because of his parents’ consanguinity.This obliged his father to make a pilgrimage to Rome soon after his birth to seek papal approval of his marriage to Hildegarde. [SEP] Knowledge 2: Ermengarde of Anjou, Duchess of Burgundy
Ermengarde of Anjou( – 18 March 1076), was a Duchess consort of Burgundy.She was the daughter of Count Fulk III of Anjou and Hildegarde of Sundgau.She was sometimes known as" Ermengarde- Blanche."She married first, Geoffrey II, Count of Gâtinais( in French" Geoffroy"), called" Ferréol" and sometimes known as" Aubri", seigneur de Château- Landon.Together they had the following children:She married secondly Robert I, Duke of Burgundy.Together they had one daughter:
Knowledge 1: Hildegarde of Burgundy
Hildegarde of Burgundy (–1104) was a French noble, Duchess consort of Gascony and Aquitaine by marriage to William VIII, Duke of Aquitaine.She was the only daughter of Robert I, Duke of Burgundy with his second wife, Ermengarde of Anjou.She was, and by marriage, Duchess of Gascony and Aquitaine.She married William VIII, Duke of Aquitaine; she was his third wife.William and Hildegarde had these children together:William’s birth was a cause of great celebration at the Aquitanian court, but the Church at first considered him illegitimate because of his parents’ consanguinity.This obliged his father to make a pilgrimage to Rome soon after his birth to seek papal approval of his marriage to Hildegarde. [SEP] Knowledge 2: 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.

Answer: Robert II of France