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.
Otto I, Count of Burgundy
Otto I( between 1167 and 1171 – 13 January 1200) was Count of Burgundy from 1190 to his death and briefly Count of Luxembourg from 1196 to 1197.
He was the fourth son of Frederick I, Holy Roman Emperor, by his second wife Beatrice I, Countess of Burgundy, daughter of Count Renaud III.
Anne Yelverton
Anne Yelverton( 1628–1698) was Countess of Manchester and Countess of Halifax.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
Peter I of Portugal
Peter I (Portuguese: "
Pedro I" (8 April 1320 – 18 January 1367), called the Just or the Cruel
(Portuguese: "o JustoO Cruel"), was King of Portugal from 1357 until his death.
He was the third but only surviving son of Afonso IV of Portugal and his wife, Beatrice of Castile.
Fred Le Deux
Frederick" Fred" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).
He is the grandfather of Tom Hawkins.
Beltrán Alfonso Osorio, 18th duke of Alburquerque
Beltrán Alfonso Osorio y Díez de Rivera, 18th Duke of Alburquerque( 15 December 1918 – 8 February 1994), was a Grandee of Spain and an amateur jockey.
As a Spanish aristocrat, he was known as the" Iron Duke" of Alburquerque.
He was also Duke of Algete, Marquis of Alcañices, los Balbases, Cadreita, Cuéllar, Cullera, and Montaos, Count of Fuensaldaña, Grajal, Huelma, Ledesma, la Torre, Villanueva de Cañedo, and Villaumbrosa.
His son, Juan Miguel Osorio y Bertrán de Lis( b. 1958), is the current Duke of Alburquerque and Duke of Algete.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Beatrice, Countess of Alburquerque
Beatrice of Portugal  was Countess of Alburquerque as the wife of Sancho Alfonso of Alburquerque.
She was the daughter of Peter I of Portugal and his wife Inês de Castro.
Frederick V, Duke of Swabia
Frederick V of Hohenstaufen (Pavia, 16 July 1164 – 28 November 1170) was duke of Swabia from 1167 to his death.
He was the eldest son of Frederick III Barbarossa and Beatrice I, Countess of Burgundy.

Question: Who is the paternal grandfather of Beatrice, Countess Of Alburquerque?
Answer: Afonso IV of Portugal