In J. R. R. Tolkien's

J. R. R. Tolkien

John Ronald Reuel Tolkien, CBE was an English writer, poet, philologist, and university professor, best known as the author of the classic high fantasy works The Hobbit, The Lord of the Rings, and The Silmarillion.Tolkien was Rawlinson and Bosworth Professor of Anglo-Saxon at Pembroke College,...

 Middle-earth

Middle-earth

Middle-earth is the fictional setting of the majority of author J. R. R. Tolkien's fantasy writings. The Hobbit and The Lord of the Rings take place entirely in Middle-earth, as does much of The Silmarillion and Unfinished Tales....

 legendarium

Tolkien's legendarium

The phrase Tolkien's legendarium is used in the literary discipline of Tolkien studiesto refer to the part of J. R. R. Tolkien's high fantasy fiction being concerned with his Elven legends; that is, historic events that have become legendary from the perspective of the characters of The Lord of the...

, Elfhelm was a lord of Rohan

Rohan

Rohan is a realm in J. R. R. Tolkien's fantasy era of Middle-earth. It is a grassland which lies north of its ally Gondor and north-west of Mordor, the realm of Sauron, their enemy . It is inhabited by the Rohirrim, a people of herdsmen and farmers who are well-known for their horses and cavalry....

 and Marshal of the East-mark.

He appears in The Two Towers

The Two Towers

The Two Towers is the second volume of J. R. R. Tolkien's high fantasy novel The Lord of the Rings. It is preceded by The Fellowship of the Ring and followed by The Return of the King.-Title:...

and The Return of the King

The Return of the King

The Return of the King is the third and final volume of J. R. R. Tolkien's The Lord of the Rings, following The Fellowship of the Ring and The Two Towers.-Title:...

, the second and third volumes of the fantasy novel The Lord of the Rings

The Lord of the Rings

The Lord of the Rings is a high fantasy epic written by English philologist and University of Oxford professor J. R. R. Tolkien. The story began as a sequel to Tolkien's earlier, less complex children's fantasy novel The Hobbit , but eventually developed into a much larger work. It was written in...

as originally published. He also appears in the posthumously published Unfinished Tales

Unfinished Tales

Unfinished Tales is a collection of stories and essays by J. R. R. Tolkien that were never completed during his lifetime, but were edited by his son Christopher Tolkien and published in 1980.Unlike The Silmarillion, for which the narrative fragments were modified to connect into a consistent and...

.

During the War of the Ring

War of the Ring

In the fictional high fantasy-world of J. R. R. Tolkien, the War of the Ring was fought between Sauron and the free peoples of Middle-earth for control of the One Ring and dominion over the continent. The War of the Ring took place at the end of the Third Age. Together with the Quest of Mount Doom,...

, he fought in the Battles of the Fords of Isen

Fords of Isen

In J. R. R. Tolkien's fictional universe of Middle-earth, the Fords of Isen were fords in the river Isen, guarded by the Rohirrim. As the only crossing of the Isen into Rohan, they were of enormous strategic importance....

 with Théodred

Théodred

Théodred is a fictional character in The Lord of the Rings by J.R.R. Tolkien. He is the only son and heir of King Théoden of Rohan.His mother, Elfhild, died in childbirth. Théodred grew up together with his cousin Éomer...

 and Grimbold

Grimbold

Grimbold of Grimslade is a character in J. R. R. Tolkien's Middle-earth legendarium. He appears in The Two Towers and The Return of the King, the second and third volumes of the fantasy novel The Lord of the Rings as originally published...

. In the Ride of the Rohirrim to Minas Tirith, he tacitly allowed the hobbit

Hobbit

Hobbits are a fictional diminutive race who inhabit the lands of Middle-earth in J. R. R. Tolkien's fiction.Hobbits first appeared in the novel The Hobbit, in which the main protagonist, Bilbo Baggins, is the titular hobbit...

 Merry

Meriadoc Brandybuck

Meriadoc Brandybuck, usually referred to as Merry, is a fictional character from J. R. R. Tolkien's Middle-earth legendarium, featured throughout his most famous work, The Lord of the Rings....

 to ride with Dernhelm. Later, Elfhelm commanded one of the three éoreds in the Battle of the Pelennor Fields

Battle of the Pelennor Fields

In J. R. R. Tolkien's fantasy fiction, the Battle of Pelennor Fields is the battle for the city of Minas Tirith between the forces of Gondor and its allies, and the forces of the Dark Lord Sauron...

.

While King Éomer

Éomer

Éomer is a fictional character in J. R. R. Tolkien's legendarium. He appears in The Two Towers and The Return of the King, the second and third volumes of Tolkien's fantasy novel The Lord of the Rings....

 was leading a large part of the Rohirrim to the Black Gate, Elfhelm was the commander of the remaining three thousand Rohirrim in Minas Tirith

Minas Tirith

Minas Tirith , originally named Minas Anor, is a fictional city and castle in J. R. R. Tolkien's Middle-earth writings. It became the heavily fortified capital of Gondor in the second half of the Third Age...

. He defeated the orc

Orc (Middle-earth)

In J. R. R. Tolkien's fantasy writings, Orcs or Orks are a race of creatures who are used as soldiers and henchmen by both the greater and lesser villains of The Silmarillion and The Lord of the Rings — Morgoth, Sauron and Saruman...

 army that was invading Gondor

Gondor

Gondor is a fictional kingdom in J. R. R. Tolkien's writings, described as the greatest realm of Men in the west of Middle-earth by the end of the Third Age. The third volume of The Lord of the Rings, The Return of the King, is concerned with the events in Gondor during the War of the Ring and with...

 from Anórien.

He is not shown in Peter Jackson

Peter Jackson

Sir Peter Robert Jackson, KNZM is a New Zealand film director, producer, actor, and screenwriter, known for his The Lord of the Rings film trilogy , adapted from the novel by J. R. R...

's version of The Lord of the Rings: The Return of the King

The Lord of the Rings: The Return of the King

The Lord of the Rings: The Return of the King is a 2003 epic fantasy-drama film directed by Peter Jackson that is based on the second and third volumes of J. R. R. Tolkien's The Lord of the Rings...

.