Gil-galad

Gil-galad was the most well-known name of Ereinion, son of Orodreth, after he ascended to become the last High King of the Ñoldor. He came to possess one of the Three Rings, which he would later give to his herald Elrond prior to his demise at the Battle of Dagorlad.

He ruled in Lindon, which was strong and secure against its enemies. Gil-galad had alliances with the Men of Westernesse, especially with the faithful. With Elendil he formed the Alliance of Elves and Men, which was so powerful as to be compared to the army which destroyed Melkor at the end of the First Age. He reigned as High King of the Ñoldor throughout the Second Age.

With the emergence of Sauron, Gil-galad joined forces with the Dúnedain King Elendil to defeat the forces spreading from Mordor. Their large and well-trained combined forces engaged Sauron's armies multiple times in the conflict known as the War of the Last Alliance. Gil-galad's famed weapon was a spear known as Aeglos; none could stand against it. Finally, at the end of the war, the Elves and Men marched on Mordor itself and laid siege to Barad-dûr, where Gil-galad was destroyed at the hands of Sauron. He fought bravely against the Dark Lord, but Sauron picked the High King up into the air; Gil-galad caught fire from the heat of his enemy and died.

In Elvish, Gil-galad means "Spark-of-bright-light".

Source: "The Silmarillion", by J. R. R. Tolkien.