Infante Fernando, Lord of Serpa

Portuguese Royalty
House of Burgundy

Afonso Henriques (Afonso I)
Children include Infanta Mafalda Infanta Urraca, Queen of Léon Infante Sancho (future Sancho I) Infanta Teresa, Countess of Flanders and Duchess of Burgundy
Sancho I
Children include Infanta Teresa, Queen of Castile Infanta Sancha, Lady of Alenquer Infanta Constança Infante Afonso (future Afonso II) Infante Pedro, Count of Urgell Infante Fernando, Count of Flanders Infanta Branca, Lady of Guadalajara Infanta Berengária, Queen of Denmark Infanta Mafalda, Queen of Castile
Afonso II
Children include Infante Sancho (future Sancho II) Infante Afonso, Count of Boulogne (future Afonso III) Infanta Leonor, Queen of Denmark Infante Fernando, Lord of Serpa
Sancho II
Afonso III
Children include Infanta Branca, Viscountess of Huelgas Infante Dinis (future Denis I) Infante Afonso, Lord of Portalegre Infanta Maria Infanta Sancha
Denis
Children include Infanta Constança, Queen of Castile Infante Afonso (future Afonso IV)
Afonso IV
Children include Infanta Maria, Queen of Castile Infante Pedro (future Peter I) Infanta Leonor, Queen of Aragon
Peter I
Children include Infanta Maria, Marchioness of Tortosa Infante Fernando (future Ferdinand I) Infanta Beatriz, Countess of Alburquerque Infante João, Duke of Valencia de Campos Infante Dinis, Lord of Villar-Dompardo John, Grand Master of the Order of Aviz (future John I) (natural son)
Ferdinand I
Children include Infanta Beatrice, Queen of Castile and Leon (future Beatrice I of Portugal)
Beatrice (disputed queen)
Children include Infante Miguel of Castile and Portugal

Infante Fernando of Portugal (pronounced [fɨɾˈnɐ̃du]), or Ferdinand in English, was a Portuguese infante, son of King Afonso II of Portugal and his wife Urraca, princess of Castile, daughter of Alfonso VIII of Castile. Fernando was born after 1217 and soon was made Lord of Serpa. It is known that he travelled to Rome around 1239 to beg for a pardon from Pope Gregory IX. He died c. 1243. He married Sancha Fernández de Lara, daughter of Fernando Núñez de Lara, Lord de Jerez, and wife Maior Garcéz de Aza, both descendants of Charlemagne and he also from Ferdinand I of Castile, but the marriage was childless. He had, however, a bastard son by an unknown woman named Dom Sancho Fernandes de Serpa, who was a Prior but had illegitimate issue, being the ancestor of the de Serpa family.