 One hypothesis asserts the name comes from the contraction of "Dandolo", surname of a noble Venetian family who gave a doge to the city of Venice and had properties here.From old maps it appears that the town’s name was sometimes reported as "Dollo", which in archaic Italian language could also mean a tower which was probably demolished thereafter, unless it refers to the church’s belfry which is the highest in the region of Veneto, second only to St. Mark’sbelfry in Venice.A lovely picture of the ancient locks of Dolo by the Venetian painter Canaletto can be seen in a London museum.