John of Arborea

John of Arborea, Giovanni de Serra Bas (1320–1376), was a younger son of Judge Hugh II of Arborea and Benedetta, raised at the Barcelona court of Alfonso IV of Aragon. In 1338 Peter IV of Aragon enfeoffed him with Bosa and Monteacuto.

Through purchases he built up an estate in Gallura and traded in grain, becoming the kingdom's wealthiest feudatory outside his ruling brother. His quarrels with Judge Marianus IV proved fatal: he was imprisoned in 1349 and died in captivity in 1376.