Ferdinand I (Portuguese: Fernando; 31 October 1345 – 22 October 1383), sometimes called the Handsome (o Formoso) or occasionally the Inconstant (o Inconstante), was the King of Portugal from 1367 until his death in 1383.
Ferdinand I, ninth king of Portugal (1367–83), whose reign was marked by three wars with Castile and by the growth of the Portuguese economy. The son of Peter I of Portugal, Ferdinand became a contender for the Castilian throne after the assassination (1369) of Peter the Cruel of Castile, thus.
Fernando de Castro fled to Portugal, but was later banished to Gascony under the terms of the Treaty of Santarém, which forced Portugal to expel many of the Galician supporters of Fernando I, dying there in 1377.
In 1383, King Ferdinand I of Portugal was dying. From his marriage to Leonor Telles de Menezes, only Princess Beatrice of Portugal survived. Her marriage was the major political issue of the day since it would determine the future of the kingdom. 
October 31, 1345 – October 22, 1383. Ferdinand I of Portugal was born in Lisbon, Portugal, on October 31, 1345. Born during the reign of his grandfather, Afonso IV, Ferdinand was the son of Prince Peter and Princess Costanza Manuel of Castile. In 1349, Costanza died, beginning a period of instability in Ferdinand’s life.
Ferdinand I ( Portuguese: Fernando; 31 October 1345 – 22 October 1383), sometimes called the Handsome ( o Formoso) or occasionally the Inconstant ( o Inconstante ), was the King of Portugal from 1367 until his death in 1383. He was also briefly made King of Galicia, in 1369 (a claim which he would maintain until 1373).
Ferdinand I, 1345–83, king of Portugal (1367–83), son and successor of Peter I. His ambitions and his private life plunged the realm into disaster, although during his reign agricultural reform was achieved and Portuguese commercial power grew. Ferdinand's desire for the throne of Castile involved him in three wars with Castile.
Ferdinand I (10 March 1503 – 25 July 1564) was Holy Roman Emperor from 1556, King of Bohemia, Hungary, and Croatia from 1526, and Archduke of Austria from 1521 until his death in 1564.
Ferdinand the Holy Prince ( Portuguese pronunciation: [fɨɾˈnɐ̃du]; Portuguese: Fernando o Infante Santo; 29 September 1402 – 5 June 1443), sometimes called the "Saint Prince" or the "Constant Prince", was an infante of the Kingdom of Portugal.
Ferdinand I, King of Portugal primary name: Ferdinand I other name: (King of) Portugal