The ancestors of the Czechs settled in Bohemia and Moravia and those of the Slovaks further East what was later to become Slovakia. The name "Bohemia" came from the Romans who called that area Boiohaemia after a Celtic tribe, the Boiis, who were displaced by the oncoming Slavs during the first five centuries AD. The earliest records of Slavic inhabitants in that area date from the end of the fifth century. Czech settlements extended as far south as the Danube River in what today is Lower Austria and the Slovaks even settled as far south as Lake Balaton in what today is Hungary.