Duke of Coimbra
Duke of Coimbra (Portuguese: Duque de Coimbra) was an aristocratic Portuguese title with the level of royal dukedom, that is, associated with the Portuguese royal house, created in 1415, by King John I of Portugal to his 2nd male son, Infante Pedro. Pedro was regent of the kingdom but he was killed in the domestic Battle of Alfarrobeira (1449).