Giovanni Nuti: COLOMBO, Bartolome, in: Dizionario Biografico degli Italiani - vol. 27 (1982) ; https://thebiography.us/en/colon-bartolome ;
In the 1470s Bartholomew was a mapmaker in Lisbon, Portugal. Further Place of Activiy: Espagne, France, England, and several regions in South America, among them what is nowadays known as Dominican Republic. Further relatives: Giacomo / Diego Columbus (14xx-1509) (brother) and Diego Columbus (1474-1526) (nephew).