Teodósio II, 7th Duke of Braganza (28 April 1568 – 29 November 1630) was a Portuguese nobleman and father of João IV of Portugal.

During the ill-fated battle of Alcácer Quibir, Teodósio remained at the side of his king until the situation become extremely dangerous.

Teodósio was the son of Infanta Catarina, an ambitious woman who, with her husband the Duke of Bragança, aspired to the throne.

Philip II of Spain also aspired to the Portuguese throne and used every means to keep young Teodósio (great-grandson of King Manuel I and a possible threat) out of the country.

Teodósio became a duke in 1583 at his father's death and grew up to be a faithful servant of the Spanish king of Portugal.