There are two main theories about the derivation of "Kerala". (1) According to Hindu mythology, parts of Kerala were created by Lord Parasurama, who reclaimed the land from the sea. Hence the name is derived from chernna ("added") and alam ("land"), hence the Sanskrit keralam, "the land added on". (2) The Chera dynasty, which ruled most of Kerala from the 1st to the 5th centuries AD, gave its name to the region; chera alam later became Keralam. This is often disputed in academic circles because the word Kerala existed even before the rule of Cheras. One of Ashoka's inscriptions describes Keralaputra as a land on the Mauryan border.