Théodred (T.A. 2978-3019) was the only son and heir of King Théoden of Rohan. His mother, Elfhild, died in childbirth.
Théodred's name is probably taken from the Anglo-Saxon words "þeod" ("folk", "people", "nation") and "ræd" ("counsel").
Théodred was slain in the First Battle of the Fords of Isen, making his cousin, Éomer, heir to the throne of Rohan.
Little else is known about Théodred, except that he loved Éomer like a brother, and the only person he loved more than Éomer was his father, Théoden.
In Peter Jackson's film version, the death of Théodred is a major event early in the movie, whereas, in the book, it has all happened by the time we come to Rohan.