Coloma, Juan de, 144?-1517 (Nombre personal)

El testamento del secretario real mosén Juan de Coloma, 2017 page 7 (this year commemorates the 5th centenary of the death of mosén Juan de Coloma, secretary to the Catholic monarchs and one of the most prominent persons born in Borja) page 13 (we know that he was born in Borja, it's believed by the 1440s)

Gran Enciclopedia Aragonesa, viewed online 17 Sept. 2019 (Juan de Coloma; born in Borja; died August 1517 in Zaragoza; as a young man, entered the court of King Juan II of Aragon, who appointed him as secretary)

National Library of Spain online catalogue, viewed 17 Sept. 2019 (heading: Coloma, Juan de, 1442-1515)