Sancho I of Portugal
Infanta Mafalda of Portugal (also known as Blessed Mafalda, O.Cist. (c. 1195 – May 1, 1256 in Rio Tinto, Gondomar; ) was a Portuguese "infanta" (princess), later Queen consort of Castile for a brief period. She was the second youngest daughter of King Sancho I of Portugal and Dulce of Aragon. Married briefly to the ten-year-old Henry I of Castile, she held for a time the title Queen of Castile.