Tommaso I Chiavelli

Tommaso I Chiavelli (c. 1262–c. 1330) was the head of the Ghibelline Chiavelli dynasty of Fabriano in the early fourteenth century, the son of Alberghetto I and father of Alberghetto II. In 1288 a papal bull, rewarding his family's defence of the Church, granted him the castle of Domo and other lands and styled him gonfaloniere of Fabriano.

In 1306 the city's conservatori della libertà drove him into exile in Naples, but he returned the next year. Banished again in 1316, he re-entered Fabriano in 1317 with his son and three hundred horsemen.

Backed by the Montefeltro, in 1325 he took office as gonfaloniere and defender of the people, and in 1326 he captured Rocca Contrada. He died around 1330.