Infante Ferdinand, Duke of Guarda

Ferdinand was born in Abrantes on 5 June 1507.^[1][2] He was Lord of Alfaiates, Sabugal and Abrantes, and Mayor of Trancoso, Lamego and Marialva. Ferdinand was friends with the renowned Portuguese intellectual Damião de Góis.^[3]

On 5 October 1530, Ferdinand was made Duke of Guarda by his brother, John III.^[1] He married Guiomar Coutinho, 5th Countess of Marialva and 3rd Countess of Loulé, a rich heiress from a Portuguese noble family.^[1][2] The marriage was arranged by John III. The couple settled in Abrantes, where their two children were born: a daughter, Luisa (born in 1531), and a son, born on 1 August 1533, who died shortly after his birth.^{[citation needed]}

Luisa, his only surviving child, died in October 1534. Ferdinand himself died one month later, on 7 November 1534, in Abrantes.^[1] He is buried in the Church of Saint Dominique of Abrantes. His widow, Guiomar Coutinho, died one month later, on 9 December.^{[citation needed]}

• Duke of Guarda
• Count of Loulé
• Count of Marialva
• Descendants of Manuel I of Portugal