What is "isildur"

Isildur is a fictional character in J. R. R. Tolkien's legendarium. He appears in the author's books The Lord of the Rings, The Silmarillion, and Unfinished Tales.

In The Lord of the Rings, he was first mentioned in The Fellowship of the Ring as a Dúnadan of Númenor, elder son of Elendil. A more complete history appears in The Silmarillion and Unfinished Tales. He was the second king of Gondor (jointly with his brother Anárion until the latter's death) and the second king of Arnor. He cut the One Ring from Sauron's hand, and was its bearer until he was killed by orcs. His name means "devoted to the moon". In a note written well after the initial publication of The Lord of the Rings, Tolkien gave Isildur's height as seven feet tall.