Who are the Eorlingas of Riddermark in Lord book?

The Eorlingas are the people of Rohan, a realm of horse-lords who inhabit the plains of the Riddermark in J.R.R. Tolkien's *The Lord of the Rings*. They are descended from Eorl the Young, a legendary warrior who came to the aid of the beleaguered people of Rohan's ancestors, the Éothéod, and was granted their lands in return.

Here's a breakdown of the Eorlingas in *The Lord of the Rings*:

* The King: King Théoden is the current ruler of Rohan, though he is under the sway of the wizard Saruman's servant, Grima Wormtongue.

* The Riders of Rohan: The Eorlingas are known for their skill as horsemen and their bravery in battle. They form the heart of Rohan's military, known as the Éored.

* Notable Members:

* Éomer: Théoden's nephew, a skilled warrior and a loyal friend to Aragorn.

* Éowyn: Théoden's niece, a shieldmaiden who disguises herself as a man to fight alongside the Rohirrim.

* Grima Wormtongue: A cunning and treacherous advisor to King Théoden.

* Theoden's Son: The king had a son, Théodred, who was killed in a skirmish with the Orcs of Saruman.

The Eorlingas play a vital role in the events of *The Lord of the Rings*. They fight bravely against the forces of Sauron and their courage and loyalty are instrumental in the final victory of good over evil.