Eldarion

Eldarion is a fictional character from J. R. R. Tolkien's universe of Middle-earth. He is the only recorded son of Arwen and Aragorn. He was born in the Fourth Age, and became King of Gondor and Arnor after his father died. He was also recorded to have several sisters.

"Eldarion" means "Son of the Elves".

In Peter Jackson's movie The Lord of the Rings: The Return of the King, Arwen is on her way to the Grey Havens to leave Middle-earth and Aragorn when she has a vision of Eldarion (although not named in the film), which persuades her to stay. This is a major departure from the events in the novel.