Who married João I, Duke of Braganza?

Dom João I of Braganza (1543 – 22 February 1583) was the 6th Duke of Braganza and 1st Duke of Barcelos, among other titles. He is known for pushing the claims of his wife, Infanta Catherine of Portugal, to the throne of Portugal.

Infanta Catherine of Portugal, Duchess of Braganza by marriage (Portuguese: Catarina; Portuguese pronunciation: [kɐtɐˈɾinɐ], 18 January 1540 – 15 November 1614) was a Portuguese infanta (princess) claimant to the throne during the Portuguese succession crisis of 1580.