Arbatax is the largest hamlet of Tortolì, Sardinia, in Italy with a population of almost 5,000 inhabitants. The origin of the name Arbatax is uncertain. According to german linuist Max Leopold Wagner, it is derived from an Arabic word, which means "14th Tower", and refers to the nearby watchtower built by the Spaniards to protect the territory from the inc…Arbatax is the largest hamlet of Tortolì, Sardinia, in Italy with a population of almost 5,000 inhabitants. The origin of the name Arbatax is uncertain. According to german linuist Max Leopold Wagner, it is derived from an Arabic word, which means "14th Tower", and refers to the nearby watchtower built by the Spaniards to protect the territory from the incursion of Arab pirates.