River Langflood

The ancestors of the Rohirrim knew the Vales of Anduin well. In their distant past they were descended from the Northmen of Rhovanion, through a group of this people who had removed northward along the Great River. The Men of the Éothéod, as this people named themselves, settled for a time in the lands southward of the Carrock, living mainly on the river's western banks. Later they moved on upriver, founding a realm for themselves in the lands around Anduin's sources and building a city at the confluence of the two lesser rivers that gave rise to the Great River.

With such a close connection to Anduin, it was natural that these Northmen would give the river a name in their own language. From their city of Framsburg, where its two source rivers joined, they named the Great River the 'Langflood', the long flooding river. By the end of the Third Age this people had removed once again, settling Rohan to become the Rohrrim. By this time 'Langflood' was an old, almost forgotten name, but a remnant of it could still be seen in the name of one of the lesser tributaries that fed the Great River. This was still known as the Langwell or 'source of Langflood', and it flowed down from the Misty Mountains to join the Greylin and form the longest and greatest river in Middle-earth.