Ferdinand, Count of Flanders
Ferdinand (24 March 1188 – 27 July 1233; Portuguese: "Fernando", French and Dutch: "Ferrand") reigned as "jure uxoris" Count of Flanders and Hainaut from his marriage to Countess Joan, celebrated in Paris in 1212, until his death.
He was born in Coimbra, and he was an Infante of Portugal as the fourth son of King Sancho I of Portugal and Dulce of Aragon.
While on their way to Flanders, Ferdinand and Joan were captured by Joan's first cousin Louis, eldest son of Philip II of France and Joan's aunt Isabella.
Louis' aim was to acquire his dead mother's dowry, a large piece of Flemish territory including Artois, which Joan's father had taken back by force after Isabella's death.
Released after this concession, Joan and Ferdinand soon joined the old allies of her father, King John of England and Emperor
Otto IV, in an alliance against France.
They were decisively defeated at Bouvines in July 1214, where Ferdinand was taken prisoner.
Ferdinand was to remain in French hands for the next 12 years, while Joan ruled alone.
He was released in 1226, by the French regent, Blanche of Castile, after the accession of her son Louis IX of France.
Ferdinand died in Noyon on 27 July 1233.
His and Joan's only child, a daughter named Maria, died childless, and their counties eventually passed to Joan's younger sister, Margaret II.
Archduke Leopold Ferdinand of Austria
Archduke Leopold Ferdinand of Austria (2 December 1868 – 4 July 1935) was the eldest son of Ferdinand IV, Grand Duke of Tuscany, and Alice of Bourbon-Parma.
Archduke Franz Karl of Austria
Archduke Franz Karl Joseph of Austria (17 December 1802 – 8 March 1878) was a member of the House of Habsburg-Lorraine.
He was the father of two emperors:
Franz Joseph I of Austria and Maximilian I of Mexico.
Through his third son Karl Ludwig, he was the grandfather of Archduke Franz Ferdinand of Austria – whose assassination sparked the hostilities that led to the outbreak of World War I – and the great-grandfather of the last Habsburg emperor Karl I.
Sancho I of Portugal
Sancho I , nicknamed "the Populator" , King of Portugal (Coimbra, 11 November 115426 March 1211)
was the second but only surviving legitimate son and fifth child of Afonso I of Portugal by his wife, Maud of Savoy.
Sancho succeeded his father and was crowned in Coimbra when he was 31 years old on 9 December 1185.
He used the title King of Silves from 1189 until he lost the territory to Almohad control in 1191.
Afonso, Prince of Portugal (1526)
Afonso, Prince of Portugal was the first son of king John III of Portugal and his queen, Catherine of Austria.
He was the Prince of Portugal but died in the same year he was born, in 1526.
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
Ferdinand of Portugal, Duke of Guarda
Ferdinand of Portugal, Duke of Guarda,( 5 June 1507 – 7 November 1534) was a Portuguese" infante"( prince), the son of King Manuel I of Portugal and his second wife, Maria of Aragon.
Isabel of Portugal, Lady of Viseu
Isabella of Portugal( 1364–1395) was the natural daughter of King Ferdinand I of Portugal, from an unknown mother.
Eleanor of Aragon, Queen of Portugal
Eleanor of Aragon( 2 May 1402 – 19 February 1445) was queen consort of Portugal as the spouse of Edward I of Portugal and the regent of Portugal as the guardian of her son.
She was the daughter of Ferdinand I of Aragon and Eleanor of Alburquerque.
Maria of Aragon, Queen of Castile
Maria of Aragon was the Queen consort of Castile and Leon as the wife of John II of Castile.
She was the daughter of Ferdinand I of Aragon and Eleanor of Alburquerque.

Question: Who is the paternal grandfather of Ferdinand, Count Of Flanders?
Answer: Afonso I of Portugal