 However, it is generally agreed among historians the Eradis were originally the autonomous rulers of Eralnadu/Eranadu region of the Kodungallur Chera kingdom.The Kodungallur Chera kingdom was a congeries of chiefdoms, which were ruled by local chiefs.The office of the chief/senior prince of Eranadu (Eralanadu Utaya) is assumed to be the hereditary.