María Díaz I de Haro
Spanish noblewoman / From Wikipedia, the free encyclopedia
For other people with the same name, see María Díaz de Haro.
María Díaz I de Haro "the Good" (1270–1342) was a Spanish noblewoman of the House of Haro. She was the daughter of Lope Díaz III de Haro who was assassinated by order of the king at Alfaro, La Rioja. She is best known for being the Lady of Biscay and for her lifelong battle against her uncle, Diego López V de Haro, for the title of the lordship of Biscay.