In pre-Islamic times the population of Arran and most of Caucasian Albania had mostly been Christian who belonged to the Church of Caucasian Albania. Under Arabic rule (7th to 9th centuries) a part of the population was Islamicized and adopted Alevism. Muslim chronicles of the 10th century reported that some of the population of Arran spoke al-rānīya, as well as Arabic and Persian languages. Because there is no written evidence, some scholars have presumed al-rānīya to be an Iranian dialect while others have presumed it to be a remnant of a Caucasian Albanian language. The area in which there was Ganja, during the 9th to 12th century named Arran; its urban population spoke mainly in Persian.