Maria is listed as the daughter of D. Lope Díaz VII de Haro and Doña Juana Alfonso de Molina both of whom have birth dates recorded as 1245.
Geni has calculated Maria's birth date to be around 1090, which it would have to be to be the husband of Gonzalo Gómez de Manzanedo, II Señor de Manzanedo (b 1080) and mother of Gómez González de Manzanedo y de Alexir, III Señor de Manzanedo (b1110)
Clearly then the dates of her parents are inconsistent ith those of her husband and son and so something must be drastically wrong with the lineage.
Sorry I am not able to explain the above clearly in Spanish!