Blanche of Castile, Infanta of Portugal

Blanche of Castile was by birth a member of the Castilian House of Burgundy. She was the only child of Infante Peter of Castile, Lord of Los Cameros and Infanta Maria of Aragon .

Blanche was born in the city of Alcocer, Guadalajara in August 1319, two months after the death of her father in the Disaster of la Vega de Granada . Her parents had married in December 1311 in the city of Calatayud. Her father, Infante Peter, was Lord of Los Cameros, Almazn, Berlanga de Duero, Monteagudo and Cifuentes and Mayordomo mayor of his brother, King Ferdinand IV of Castile after the latters death he was appointed guardian of his nephew Alfonso XI of Castile and joint Regent of the Kingdom together with the infant Kings grandmother , Maria de Molina and Infante John of Castile, Lord of Valencia de Campos , who was also killed in la Vega de Granada with Peter.

Source: Wikipedia