House of Braganza before his father and therefore did not succeed him. Afonso I's first daughter, Isabel of Braganza, married Infante João, Lord of Reguengos de Monsaraz, thus relinking the House of Braganza to the Royal House of Portugal. Isabel's strategic marriage proved successful, and produced four children, whose descendants would be some of the most important in Iberian history. Afonso I's last child and successor, Fernando I, Duke of Braganza, continued his legacy of prominence in the military and society. When Fernando I was born, in 1403, his grandfather, Nuno Álvares Pereira, ceded him the title of Count of Arraiolos. Fernando became
Teodósio I, Duke of Braganza Teodósio I, Duke of Braganza Dom Teodósio I of Braganza (; 1510 – 22 September 1563) was the 5th Duke of Braganza, among other titles. He is known for ceding the title of Duke of Guimarães to Infante Duarte of Aviz, alongside some of the wealth and properties of the House of Braganza. The Duke Teodósio I was an educated and refined man, a typical renaissance prince. He loved painting and sculpture. In 1542, he married his 1st cousin (1513–1558), daughter of his uncle Dinis, and had John I of Braganza. Their child, João I succeeded him as 6th Duke