Diego Ordonez was a Castilian knight of the thirteenth century who had the office of alguacil mayor of Seville.
The date on which he was appointed to the post is unknown, and it appears in 1274, making a territorial delimitation between the councils of Moura (Portugal) and Aroche (Huelva), as procurator of King Alfonso X de Castile and with sufficient power of the council of Seville.Also in the same year it is mentioned with the charge in a letter plomada of the king.
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