Noldorin Elf poet and singer mentioned in The Silmarillion, a collection of J.R.R. Tolkien's The Lord of the Rings writings edited by his son Christopher. He was one of the Sons of Fëanor, sworn to recover the Silmarils, no matter what.
He composed the lament Noldolantë, "Fall of the Noldor," in memory of the Kinslaying at Alqualondë, in which he participated. He also was apparently Elrond's stepdad?!
Of the Kinslaying at Alqualondë more is told in that lament which is named Noldolantë, the Fall of the Noldor, that Maglor made ere he was lost.