Tobia de Columnis was a Genoese slaveholder and banker active during the late fourteenth and early fifteenth centuries. He was born as Tobia Castagna and was admitted into the Columnis albergo sometime in the early fifteenth century.
Giuliano Canella, register 6, 1418–1421, fol. 216r
Andreolo Caito, register 4, 1392–1393, fol. 76r–v