Background
He was son of Domingo I de Borja and Caterina whose family name is not known.
He was son of Domingo I de Borja and Caterina whose family name is not known.
He held the title over the Señor de la Torre de Canals. Juan Domingo made his fortune in Jativa where he was involved in local commerce, specifically in the sugar trade. On 2 February 1375, a Domingo de Borja, believed to be the father of Calixtus III testified in a document as a citizen of Játiva.
In 1404, Juan Domingo was recorded as having been granted the title of Sobreguarda of the frontiers of the Kingdom of Castile by King Martin of Aragon In 1408, Domingo"s son Alfonso de Borja y Cavanilles (future Pope Calixtus III) granted his father the power to collect the pension of a censor in Vall de Pego.
He was a member of the prestigious House of Borja.