Hugh II, Count of Blois
Hugh II of Châtillon (died 1307), son of Guy III, Count of Saint-Pol, and Matilda of Brabant, was count of St Pol 1289–1292 and count of Blois 1292–1307.
He married c. 1287
Beatrix of Dampierre, daughter of Guy of Flanders and Isabelle of Luxembourg.
They had two children:
Theobald II of Blois
Theobald II, Count of Blois( Thibaut II; c. 985 – 11 July 1004) was the eldest son and heir of Odo I, Count of Blois, and Bertha of Burgundy.
The stepson of Robert II of France, he became Count of Blois, Châteaudun, Chartres and Reims after the death of his father in 996.
Theobald II left no heirs; on his death, he was succeeded by his younger brother, Odo II, Count of Blois.
Guy I, Count of Blois
Guy I of Châtillon, Count of Blois( died 12 August 1342), son of Hugh II of Châtillon and Beatrix of Dampierre, was Count of Blois and Lord of Avesnes 1307 – 1342.
In 1310, he married Margaret of Valois, daughter of Charles of Valois and sister of Philip VI of France.
They had three children:
He took part in the expedition of Louis X of France against his uncle Robert III of Flanders in 1315, and in the early stages of the Hundred Years' War.
Guy III, Count of Saint-Pol
Guy III of Châtillon, Count of Saint-Pol (died 1289) was a French nobleman, and was a younger son of Hugh I, Count of Blois and Mary, Countess of Blois.
While his elder brother John I of Châtillon succeeded to their mother's County of Blois, Guy was given their father's county of Saint-Pol-sur-Ternoise at his death in 1248.
On January 16, 1255, he married Matilda of Brabant, Countess of Artois, daughter of Henry II, Duke of Brabant and Marie of Hohenstaufen, and thereafter was a supporter of his brother-in-law Henry III against Guelders.
They had:
He joined the Eighth Crusade (1270) and the ill-fated Crusade of Aragón of Philip III of France.
Enguerrand II, Count of Ponthieu
Enguerrand II( d. 25 October 1053) was the son of Hugh II count of Ponthieu.
He assumed the county upon the death of his father on November 20, 1052.
Louis III, Count of Blois
Louis III of Châtillon( died 1372), son of Louis II, Count of Blois and Jeanne of Hainault, was count of Blois and lord of Avesnes 1346 – 1372, and count of Soissons 1346 – 1367.
After the Battle of Poitiers, he had to send his brother Guy as a hostage to London, and ultimately sold Soissons to Enguerrand VII de Coucy to ransom him.
Alix of France
Alix of France( July – August 1150 – 1197/1198) was countess consort of Blois by marriage to Theobald V, Count of Blois.
She was regent of Blois during the absence of her spouse in 1190- 1191, and regent during the minority of Louis I, Count of Blois from 1191 until 1197.
Bertha of Blois
Bertha of Blois (French: "Berthe de Blois"; c. 1005 — c. 1080), was a Duchess consort of Brittany and a countess consort of Maine, married in 1018 to Alain III, Duke of Brittany, and in 1046 to Hugh IV, Count of Maine.
She was the daughter of Odo II, Count of Blois and Ermengarde of Auvergne.
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.
Hugh II, Count of Maine
Hugh II( 920- before 992), Count of Maine, son of Hugh I, Count of Maine, and an unknown mother, probably a daughter of Gauzlin II, Count of Maine.
He was, like his father, a vassal of his uncle Hugh the Great.
After the death of Hugh the Great, Hugh II allied himself Fulk II the Good, Count of Anjou, and Theobald the Trickster, Count of Blois.
Hugh later joined Theobald ’s son Odo against Seinfroy, Bishop of Le Mans.
Hugh and Odo had to flee and seek refuge with Bouchard I, Count of Vendôme, in the areas that form the Bas- Vendômois.
In 939 he fought alongside Alan II, Duke of Brittany and Judicael Berengar against the Vikings at the Battle of Trans- la- Forêt.
Hugh had by his unknown wife: Hugh III, Count of Maine, Fulk of Maine,( d. after 992) and Herbert “ Baco ” of Maine( d. after 1046), regent of Hugh IV, Count of Maine.
Hugh was succeeded as Count of Maine by his son Hugh III.

Question: Who is Hugh Ii, Count Of Blois's paternal grandfather?