Ursus Hypatos (†737) (also Orso Ipato) was the 3rd doge of Venice, and probably the first to be chosen by the Venetians. He was killed in an internal struggle in 737.
The account of the election of the first three doges of Venice (Pauluccio, Marcello and Orso), from the anonymous “Chronicon Altinate”.
The first doges, from the “Chronica per extensum descripta” (1340s) by Andrea Dandolo.
The Venetian state was always an ad hoc construct, and institutions came and went at the convenience of the ruling elite.