della Rocca

The della Rocca were one of the five great Cinarchesi noble clans of southern Corsica, holding Rocca after Genoa replaced Pisa as Corsica's ruler at the end of the thirteenth century. Guglielmo della Rocca was named vicar of the Genoese governor in 1340, but in 1353 he rebelled and declared for Aragon; he was defeated and died in 1354.

His son Arrigo, held hostage in Genoa, escaped in 1356 and fled to Catalonia during the revolt of 1357, entering Aragonese service. In 1372 he landed with Aragonese troops, overran most of the island and was elected count of Corsica at Biguglia in 1373, ruling under Aragonese suzerainty.

He was driven into Aragon in 1392 and returned with an army in 1394. He crushed another Genoese invasion at Biguglia in 1397, before dying of plague at Frasso in 1401.