Guglielmo Azzone Castelbarco

Guglielmo Azzone Castelbarco (born c. 1301) was lord of Ala, Avio and Brentonico in the bishopric of Trent and a condottiero loyal to the Scaligeri of Verona. He was nephew of the condottiero Guglielmo Castelbarco il Grande (died 1320).

In 1319 he married Tommasina Gonzaga, daughter of Ludovico I, first lord of Mantua and a key Scaligeri ally. On 16 August 1328 he led armed Veronese into Mantua and took part in expelling the Bonacolsi, helping bring the Gonzaga to power.

Faithful to the imperial cause, in 1333 he hosted Charles of Luxembourg, emperor from 1355, in his castle of Avio. He and Tommasina had six children. His tomb, first set in the castle's chapel of Sant'Antonio Abate, now stands in the church at Loppio.