sentences:  The house was founded by John I of Portugal, who was the Grand Master of the Order of Aviz.When King John II of Portugal died without an heir, the throne of Portugal passed to his cousin, Manuel, Duke of Beja.When King Sebastian of Portugal died, the throne passed to his uncle, Henry of Portugal (he might be called Henry II because Henry, Count of Portugal, father of Alphonso I of Portugal, was the first of that name to rule Portugal).