Antonino was patriarch of Grado, from circa 725 (or 730) to 748 (or 741), as we don’t have much information.
The Lombard conquest of Ravenna and how the Venetians saved the Exarchate (730s or 740s), excerpt from the “Istoria Veneticorum” by John the Deacon.
The complete list of the Patriarchs of Grade, Patriarchs of Grado in Venice, and Patriarchs of Venice, since 717 until today