In ancient times name (surename) Bailo is mentioned during times Venetian and Florentine colonies in Levant, as civil employee who acted as consul and ambassador.

In 1310, in city of Ferrara, there was Guglielmo di Giovanni, who took oath of fidelity to the Holy See. In the following century, a branch moved to Finale, where from 1439 some Angelo was named mayor, while his son Giacomo son was councilman. In 1545, Bailo was publicly announced enemies of Finale, news which spread to Venice.

The branch which remained in Ferrara give life to Francisco, celebrated scholar, who died in Venice in 1556, while in the same period we find Bailo surname in Istria and Dalmatia.

Known uses of title Bailo: