Elrohir

Elrohir was the twin brother of Elladan, older brother of Arwen, and one of the three children of  Celebrian and Elrond,

History
Elrohir and his brother, Elladan, were born in TA 130.Only those who knew them could tell which one was different from the other. The brothers also inherited their father's long, dark brown hair.

In TA 2509, Elladan and Elrohir rescued their mother from a pack of orcs but she had been mentally wounded even though her husband fixed her poisoned, physical wound. The following year their mother left Middle-earth, and through this, Elladan and Elrohir developed a hatred of Orcs.

After the War of the Ring, though their father left Rivendell and Middle-earth, Elladan and Elrohir remained there. Like their father, paternal uncle, and sister, the brothers could decide if they would chose to be human or immortality. Whether they chose to live as humans is unknown; however, they could delay in their decision. Considering they stayed behind in Middle-earth for a time, they either decided to become humans or accept their immortality.