Title: Edward, King of Portugal
Content:  Duarte (31 October 1391 – 9 September 1438), known in English as Edward and called the King Philosopher (o Rei-Filósofo) or the Eloquent (o Eloquente), was King of Portugal from 1433 until his death. He was born in Viseu, the son of John I of Portugal and his wife, Philippa of Lancaster. Edward was the oldest member of the "Illustrious Generation" of accomplished royal children who contributed to the development of Portuguese civilization during the 15th century. As a cousin of several English kings, he became a Knight of the Garter.
Title: Eleanor of Aragon, Queen of Portugal
Content:  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.
Title: History of Portugal (1415–1578)
Content:  and kind personality. His love for knowledge and culture was passed to his sons, often collectively referred to by Portuguese historians as the "illustrious generation" (Ínclita Geração): Edward, the future king, was a poet and a writer; Peter, the Duke of Coimbra, was one of the most learned princes of his time; and Prince Henry the Navigator, the duke of Viseu, invested heavily in science and the development of nautical pursuits. In 1430, John's only surviving daughter, Isabella, married Philip the Good, Duke of Burgundy, and enjoyed an extremely refined court culture in his lands; she was the mother of Charles the Bold.
Title: Catarina of Portugal, Duchess of Braganza
Content:  She was the second daughter of Edward, Duke of Guimarães (sixth son of Manuel I of Portugal) and Isabel of Braganza, she was married to John I, Duke of Braganza, a descendant of earlier Portuguese monarchs, and head of the most important aristocratic House in Portugal. The duchess had several children, of whom Theodosius of Braganza, was her eldest surviving son. When King Henry died (1580), Edward's issue were the only surviving legitimate heirs of any of the sons of King Manuel I of Portugal. As the male line is preferred in Portuguese succession before the female one, descendants of Manuel I's daughters (such as 
Title: Prince of Portugal
Content:  Due to English tradition introduced to the Portuguese court by Philippa of Lancaster, her son King Edward sought to create a princely title for the heir apparent, much like the Prince of Wales, to distinguish him from his siblings, who were infantes. Until that time, the heir apparent was also titled infante. In 1433 Edward granted the title of Prince of Portugal to his eldest son, the future King Afonso V. The monarchies of Castile, Aragon and England already had princely titles for their heirs apparent and now Portugal had one, so that foreign powers would not underestimate the prestige of the kingdom. In 1645, the title was replaced with Prince of Brazil.
Title: Edward, King of Portugal
Content:  Duarte married Eleanor of Aragon, a daughter of Ferdinand I of Aragon and Eleanor of Alburquerque, in 1452.
Title: John I of Portugal
Content:  the same time possessed a benevolent and kind demeanor. His youthful education as master of a religious order made him an unusually learned king for the Middle Ages. His love for knowledge and culture was passed on to his sons, who are often referred to collectively by Portuguese historians as the "illustrious generation" (Ínclita Geração): Edward, the future king, was a poet and a writer; Peter, the Duke of Coimbra, was one of the most learned princes of his time; and Prince Henry the Navigator, the duke of Viseu, invested heavily in science and the development of nautical pursuits. In 1430, John's only surviving daughter, Isabella, married Philip the Good, Duke of Burgundy, and enjoyed an extremely refined court culture in his lands; she was the mother of Charles the Bold.
Title: Edward, King of Portugal
Content:  Before he ascended the throne, Duarte always followed his father in the affairs of the kingdom. He was knighted in 1415 after the Portuguese capture of the city of Ceuta in North Africa, across from Gibraltar. He became king in 1433, when his father died of the plague. As king, Duarte soon showed interest in building internal political consensus. During his short reign of five years, he called the Portuguese Cortes (the national assembly) no less than five times to discuss the political affairs of his kingdom. He also followed the politics of his father concerning the maritime exploration of Africa. He encouraged and financed his famous brother, Henry the Navigator, who initiated many expeditions on the west coast of Africa. An expedition of Gil Eanes in 1434 first rounded Cape Bojador on the northwestern coast of Africa, leading the way for further exploration southward along the African coast.
Title: Afonso V of Portugal
Content:  Afonso was born in Sintra, the second son of King Edward of Portugal by his wife Eleanor of Aragon. Following the death of his older brother, Infante João (1429–1433), Afonso acceded to the position of heir apparent and was made the first Prince of Portugal by his father, who sought to emulate the English Court's custom of a dynastic title that distinguished the heir apparent from the other children of the monarch. He was only six years old when he succeeded his father in 1438. During his minority, Afonso was placed under the regency of his mother, Leonor, in accordance 
Title: Ferdinand of Portugal, Lord of Eça
Content:  Ferdinand of Portugal (Fernando), later of Eça or Eza (c. 1378 – Eza?), was the son of Portuguese Infant João, Duke of Valencia de Campos. João, was a son of king Peter I of Portugal with powerful and literary famous for several centuries in several European languages, Galician lady Inés de Castro, "the Queen who ruled after her death". His father, Infante John, Duke of Valencia de Campos, (Coimbra 1349-Salamanca 1397), buried there, had been legitimized as Infant of Portugal, and became Duque de Valencia de Campos in Castile through his marriage to one of the bastards of bastard king Henry II of Castile. Fernando's father John, had married in 1376, (1st marriage), Castilian lady Maria Téllez de Menezes, assassinated shortly after in 1378 by her husband, who had been alerted of her apparent unfaithfulness. Then, he married again in Valencia de Campos in 1378 Constanza de Castilla, Lady of Valencia de Campos, illegitimate daughter of bastard King Enrique II of Castile, who was therefore the step mother of orphaned Fernando of Portugal, thus becoming consort duke of Valencia de Campos.

Question: Who is the father of Edward I of Portugal?
Answer: John I of Portugal.
João I de Portugal.