Juan Galvan Alvarez de Godoy was the son of Juan Galvan Alvarez de Godoy and Nicolasa Flores de Abrego.
He requested a dispensation to marry Josefa Valdez on 8 Mar 1717 in Monclova. Her husband had disappeared and was presumed dead (dispensation was denied). Dispensation source: Guerra et al., Index to the Marriage Investigations of the Diocese of Guadalajara, 12-3, p.62 (Link to original).