Ferdinand I (Spanish: Fernando I; 27 November 1380 – 2 April 1416 in Igualada, Òdena) named Ferdinand of Antequera and also the Just (or the Honest) was king of Aragon, Valencia, Majorca, Sardinia and (nominal) Corsica and king of Sicily, duke (nominal) of Athens and Neopatria, and count of Barcelona, Roussillon and Cerdanya (1412–1416).https://en.wikipedia.org/wiki/Ferdinand_I_of_Aragon
Ferdinand I (Spanish: Fernando I; 27 November 1380 – 2 April 1416 in Igualada, Òdena) named Ferdinand of Antequera and also the Just (or the Honest) was king of Aragon, Valencia, Majorca, Sardinia and (nominal) Corsica and king of Sicily, duke (nominal) of Athens and Neopatria, and count of Barcelona, Roussillon and Cerdanya (1412–1416).
Ferdinand I, byname El de Antequera (“He of Antequera”) or El Infante de Antequera (“the Infante of Antequera”), (born 1379?—died April 2, 1416, Igualada, Catalonia), king of Aragon from 1412 to 1416, second son of John I of Castile and Eleanor, daughter of Peter IV of Aragon.
Ferdinand I, Italian Ferrante or Ferdinando, (born 1423, Valencia, Spain—died Jan. 25, 1494), king of Naples from 1458. He was the illegitimate son of Alfonso V of Aragon, who, after establishing himself as king of Naples in 1442, had Ferdinand legitimized and recognized as his heir.
Ferdinand II, byname Ferdinand the Catholic, Spanish Fernando el Católico, (born March 10, 1452, Sos, Aragon [Spain]—died January 23, 1516, Madrigalejo, Spain), king of Aragon and king of Castile (as Ferdinand V) from 1479, joint sovereign with Queen Isabella I.
Ferdinand of Aragon marries Isabella of Castile in Valladolid, thus beginning a cooperative reign that would unite all the dominions of Spain and elevate the nation to a dominant world power.
Ferdinando Trastámara d'Aragona, of the Naples branch, universally known as Ferrante and also called by his contemporaries Don Ferrando and Don Ferrante  (2 June 1424, in Valencia – 25 January 1494, in Naples ), was the only son, illegitimate, of Alfonso I of Naples. He was king of Naples from 1458 to 1494.
By 1480, the joint rule of Ferdinand and Isabella over a united Spain was an established fact. Ferdinand, through his father, became King of Aragon and Sicily, and Count of Barcelona. Isabella, through right of conquest from la Beltraneja and the Portuguese, was Queen of Castile and Leon.
Ferdinand was born in 1503 in Alcalá de Henares, Castile, the second son of Philip I of Castile and Joanna of Castile. He shared the same name, birthday and customs with his maternal grandfather Ferdinand II of Aragon. He was born, raised, and educated in Castile, and did not learn German until he was a young adult.
Ferdinand I ( c. 1015 – 24 December  1065), called the Great ( el Magno ), was the count of Castile from his uncle's death in 1029 and the king of León after defeating his brother-in-law in 1037. According to tradition, he was the first to have himself crowned Emperor of Spain (1056), and his heirs carried on the tradition.
Ferdinand II (Aragonese: Ferrando; Catalan: Ferran; Basque: Errando; Italian: Ferdinando; Latin: Ferdinandus; Spanish: Fernando; 10 March 1452 – 23 January 1516), also called Ferdinand the Catholic (Spanish: el Católico), was King of Aragon and Sardinia from 1479, King of Sicily from 1468, King of Naples (as Ferdinand III) from 1504 and King of Navarre (as Ferdinand I) from 1512 until his ...