The Nobiliario of Pedro Conde de Barcelos names "D. Alonso, D. Maria" as children of "El Infante D. Alonso" and his wife "D. Mayor Alonso". The Chronicon de Cardeña records that “El Rey D. Sancho” married “la Reyna Doña Maria…fija del Infant D. Alfonso…de Molina…hermano del Rey D. Ferrando”. The Chronicon Domini Joannis Emmanuelis records the marriage in Jul 1282 of “Rex Dns Sancius, adhuc Infans” and “Regina Dna Maria Toleti”. She received Valladolid, Toro, Ecija, Zafra and Astudillo as her dowry in 1284.
Regent of Castile for her son King Fernando IV 1295-1314, and for her grandson King Alfonso XI 1314-1321. The testament of "doña Maria…reyna de Castilla, de Leon, y señora de Molina", dated 29 Jun 1321, names "el Rey D. Fernando mio fijo", makes donations for the souls of "el Rey don Sancho…doña Blanca mi hermana señora que fue de Molina...el Ynfante D. Enrique mio fijo", provides for "el Rey don Alfonso mio nieto…la Infanta doña Isabel mi fija…Infante don Felipe mio fijo…doña Maria mia sobrina muger que fue del Infante d. Juan".
The Chronicon Domini Joannis Emmanuelis records the death in Jul 1321 of “Regina Dna Maria in Valleoleti”, adding in a later passage that she was buried in “monasterium de Olgis”. The Crónica del Rey Alfonso XI records the death 1 Jun of “la Reyna Doña Maria” in “el monasterio de Sanct Francisco de Valledolit” and her burial “en su monasterio en Sancta Maria la Real...agora se llama las Huelgas de Valledolit”. 1
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