Eastemnet
From Tolkien Gateway
The wide land between the Rivers Entwash and Anduin, the easternmost of those held by the Rohirrim. Its name Eastemnet comes from language of Rohan: the word Eastemnet in that tongue means 'east-plain'. There were few fixed settlements here, but many of the herdsmen of the Rohirrim lived a nomadic existence on the fields of the Eastemnet, living out of temporary camps and driving their herds across the grasslands.