Adele of Valois
Adele of Valois was a daughter of Ralph IV of Valois and Adele of Bar-sur-Aube.
She married firstly Herbert IV, Count of Vermandois, and they had:
She was also the second wife of Theobald III, Count of Blois, and they had:
Pepin III, Count of Vermandois
Pepin III, Count of Vermandois( also known as Pepin II, Count of Senlis; French:" Pépin")( c. 846 – 893) was a Frankish noble; the Count of Senlis and Count of Vermandois( 850 – 893); Lord of Valois( 877 – 886), and later Count of Valois( 886 – 893).
He was a son of Pepin, Count of Vermandois and Valois and thus a grandson of Bernard of Italy, who was himself a grandson of Charlemagne.
The brothers of Pepin III were Herbert I, Count of Vermandois and Bernard II, Count of Laon.
Pepin III of Vermandois's wife is unknown; their son was:
Herluin de Conteville
Herluin de Conteville( 1001 – 1066), also sometimes listed as Herlwin of Conteville, was the stepfather of William the Conqueror, and the father of Odo of Bayeux and Robert, Count of Mortain, both of whom became prominent during William's reign.
He died in 1066, the year his stepson conquered England.
Herbert III, Count of Vermandois
Herbert III of Vermandois( 953–1015), Count of Vermandois, was the son of Adalbert I of Vermandois and Gerberge of Lorraine.
Héctor Barrantes
Héctor Barrantes Sansoni( 1939–1990) was an Argentine polo player.
He was the stepfather of Sarah, Duchess of York.
Odo I, Count of Vermandois
Odo I or Eudes I, called "the Insane" (died after 1085), was Count of Vermandois and Valois from 1080 to 1085 and ruler of Saint-Simon from 1085.
The last Carolingian male (from its branch Herbertines)
, he was the only son of Herbert IV of Vermandois and Adele of Valois, daughter of Raoul III of Valois and Adele of Bar-sur-Aube.
From 1080 he inherited Vermandois from his father and Valois from his mother, heir of Raoul III, although he was disinherited by Herbert IV.
He was probably mentally insane.
In 1085 the council of barons took the power away from him and gave it to his sister Adelaide, Countess of Vermandois, married to Hugh, son of Henry I of France.
Odo I was given Saint-Simon because of his marriage with Hedwig, the daughter of knight Viromandensis.
There is no known data about him after 1085 due to lack of historical evidence.
In the 17th century, Claude Rouvroy (de Saint-Simon), favourite of Louis XIII of France, presented a false family tree, stating that he was heir of Odo I.
By this he became the ruler of Saint-Simon and added it to his surname.
Otto, Count of Vermandois
Otto( or Eudes) of Vermandois( or Vermicelli)( 29 August 979 – 25 May 1045), Count of Vermandois, was the son of Herbert III, Count of Vermandois and Ermengarde of Bar-sur- Seine.
He succeeded his brother, Adalbert II as count of Vermandois in 1015.
Otto donated property to Notre- Dame de Homblières by charter.
Adalbert I, Count of Vermandois
Adalbert I of Vermandois(" the Pious"), in 946 he succeeded his father as Count of Vermandois.
Herbert IV, Count of Vermandois
Herbert IV of Vermandois( 1028–1080), Count of Vermandois, was the son of Otto of Vermandois and Parvie( Pavia or Patia).
Elisabeth, Countess of Vermandois
" Not to be confused with Elizabeth of Vermandois, Countess of Leicester" Elisabeth of Vermandois also known as Isabelle Mabile or Isabelle de Vermandois
( 1143 – Arras 28 March 1183) was ruling Countess of Vermandois from 1168 to 1182, and also Countess of Flanders by marriage to Philip I, Count of Flanders.
She was the eldest daughter of Ralph I, Count of Vermandois and his second spouse Petronilla of Aquitaine.

Question: Who is Odo I, Count Of Vermandois's father?