Zaida of Seville

), was a refugee Muslim princess, formerly associated with the Abbadid dynasty, who became a mistress and then perhaps wife of king Alfonso VI of Castile.

[2][4][5][6] With the fall of Seville to the Almoravids, she fled to the protection of Alfonso VI of Castile, becoming his mistress, converting to Catholicism and taking the baptismal name of Isabel.

It has been suggested that Alfonso's fourth wife – also named Isabel – may have been Zaida,[7][6][8][9] but this is still subject to scholarly debate.

[10] Alfonso's daughters Elvira and Sancha, were by Queen Isabel and Zaida may, therefore, have been their mother.

Regina Elisabeth, uxor regis Adefonsi, filia Benabet Regis Sevillae, quae prius Zayda, fuit vocata ("Queen Isabel, wife of King Alfonso, daughter of Aben-abeth, king of Seville; previously called Zayda.