Ferdinand of Castile (born 1238)
Ferdinand of Castile (1238 - before 1264/1269), Infante of Castile, was the son of King Ferdinand III of Castile and Joan of Danmartin.
He was the Count of Aumale, Baron of Montgomery and of Noyelles-sur-Mer.
John I, Count of Aumale
John I of Ponthieu(? – Kortrijk, County of Flanders, Kingdom of France, July 11, 1302) was Count of Aumale.
He was son of Ferdinand II, Count of Aumale, and Laura of Montfort.
After the death of his father in 1260, he became co-ruler in the County of Aumale with his grandmother Joan.
They reigned together until her death in 1279.
John married Ida of Meulan, and had a son John II( 1293 – 1343), who succeeded him.
John fought as a knight in the French army against the Flemish in the Battle of the Golden Spurs on July 11, 1302 near Kortrijk, and was one of the many nobles killed in the battle.
Odo, Count of Champagne
Odo( Modern; 1115) was Count of Troyes and of Meaux from 1047 to 1066, then Count of Aumale from 1069 to 1115.
He was later also known as the count of Champagne and as Eudes II of Troyes.
Antoine, Count of Vaudémont
Antoine of Vaudémont( – 22 March 1458) was Count of Vaudémont and Sieur de Joinville from 1418 to 1458.
By marriage, he was also Count of Harcourt, Count of Aumale, and Baron of Elbeuf from 1452 to 1458.
Hawise, Countess of Aumale
Hawise, Countess of Aumale( died 11 March 1214) was ruling Countess of Aumale from 1179 until 1194 with her husbands.
She was the daughter and heiress of William, Count of Aumale and Cicely, daughter and co-heiress of William fitz Duncan.
She became Countess of Essex by her marriage to William de Mandeville, 3rd Earl of Essex.
Ferdinand III of Castile
Ferdinand III (Spanish: Fernando III), 1199/120130 May 1252, called the Saint ("el Santo"), was King of Castile from 1217 and King of León from 1230 as well as King of Galicia from 1231.
He was the son of Alfonso IX of León and Berenguela of Castile.
Through his second marriage he was also Count of Aumale.
Ferdinand III was one of the most successful kings of Castile, securing not only the permanent union of the crowns of Castile and León, but also masterminding the most expansive campaign of Reconquista yet.
By military and diplomatic efforts, Ferdinand greatly expanded the dominions of Castile into southern Spain, annexing many of the great old cities of al-Andalus, including the old Andalusian capitals of Córdoba and Seville, and establishing the boundaries of the Castilian state for the next two centuries.
Ferdinand was canonized in 1671 by Pope Clement X and, in Spanish, he is known as "Fernando el SantoSan Fernando" or "San Fernando Rey".
Places such as the cities of San Fernando, Pampanga and San Fernando, La Union; the Diocese of Ilagan and the San Fernando de Dilao Church in Paco, Manila in the Philippines; and in California, United States, the City of San Fernando and the San Fernando Valley, were all named after him (namesakes) and placed under his patronage.
Stephen of Aumale
Stephen of Aumale( – 1127) was Count of Aumale from before 1089 to 1127, and Lord of Holderness.
William de Forz (died 1195)
William de Forz( died 1195)( Latinised to Willelmus de Fortibus) was a minor Anglo- Norman noble, by origin from Fors in Poitou.
He became by the right of his wife(" jure uxoris") second Count of Aumale( or Albemarle) following his marriage to Hawise, sole heiress of William le Gros, Earl of York, Count of Aumale and William de Forz, 3rd Earl of Albemarle was their son.
Philip Augustus took control of Aumale( also known as Albemarle) in the 1190s, thus depriving the Anglo- Norman Earls of Albemarle of their continental land- holdings.
Jean, Count of Harcourt
John of Lorraine- Vaudémont( died 1473) was a younger son of Antoine of Lorraine, Count of Vaudémont and Marie of Harcourt.
He was Count of Harcourt and Count of Aumale, as well as Baron of Elbeuf.
His mother was the eldest daughter of John VII of Harcourt, Count of Harcourt and Aumale.
Her brother, John VIII of Harcourt, her father's heir, died in 1424.
In anticipation of this, she assigned to John the County of Harcourt in 1448.
In 1449, at the breakdown of the Truce of Tours, he was sent as an ambassador to Philip III, Duke of Burgundy, by King Charles VII of France.
In 1452, his maternal grandfather died.
John attempted to secure the whole inheritance for himself and his mother.
After his father, he was Count of Harcourt and Count of Aumale( as" John VI").
While briefly effective, by 1454, his mother's younger sister had gained control of the County of Aumale.
He was appointed captain of Angers in 1469, and later seneschal and governor of Anjou.
He died in 1473, unmarried, and was succeeded by his nephew, René II, Duke of Lorraine.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.

Question: Who is Ferdinand Of Castile (Born 1238)'s paternal grandfather?
Answer: Alfonso IX of León