Maria Guadalupe Flores de Abrego was born circa 1737, the daughter of Sebastian Flores de Abrego and Francisca Javiera Flores de Valdez.
She requested a dispensation to marry Carlos de Alderete y Guerrero in 1745 in Saltillo. Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, p.266 (Link to original).