Arms of Ferdinand of Portugal, Duke of Guarda and Trancoso.
The Infante Fernando, Duke of Guarda and Trancoso (1507–1534; pron.IPA: [fɨɾ'nɐ̃du]; English: Ferdinand) was a Portugueseinfante son of KingManuel I of Portugal and his second wife Maria of Aragon. Ferdinand was born in Abrantes on June 51507. He was made Duke ofGuarda by his father. He was also Duke of Portugal and Lord of Alfaiates, Sabugal and Abrantes, and Mayor of Trancoso, Lamego and Marialva. He married in 1530 to Guiomar Coutinho, 5th Countess of Marialva and Loule. The couple settled in Abrantes, when their two children were born: a daughter, Luiza, born in 1531, and a son, born on 1 August1533 and died shortly after his birth. Luisa, his only surviving child, died on October1534. Ferdinand himself died one month later, on November 71534 in Abrantes, and is buried in the Church of Saint Dominique of Abrantes. His widow, Guiomar, died one month later, on 9 December[1].