María Díaz de Haro may refer to:
*María Díaz de Haro, daughter of
Diego López II de Haro
Diego López II de Haro called ''the Good'' or ''the Bad'' (c. 1152 – 16 September 1214). Son of Lope Diaz I de Haro, count of Nájera (b. 1126–1170) and of countess Aldonza. He was a first rank magnate in the kingdom of Castile under King ...
, wife of count Gonzalo Núñez de Lara
*
María Díaz I 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 o ...
(1270-1342), Lady of Biscay, daughter of Lope Díaz III de Haro, wife of John of Castile
*
María Díaz II de Haro
María Díaz II de Haro ( - 16 September 1348) was a Spanish nobility, noble of the House of Haro. She was the daughter of Juan de Castilla y Haro and his wife, Iabel of Portugal, Lady of Penela, Isabel of Portugal and was Lord of Biscay, Lady o ...
(1318/1320-1348), Lady of Biscay, daughter of
Juan de Castilla y Haro, wife of
Juan Núñez III de Lara
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