The Partecipazio was one of the dominant families in Venice in the 800s, with several doges and bishops.
Lists of the houses or noble families of the Republic of Venice.
“Doge” from the L’Archivio di Stato di Venezia: indice generale, storico, descrittivo ed analitico (1937) by Andrea da Mosto
The doge was the elected head of the Venetian Republic. He was elected for life by an arcane process that also included drawing lots.