Tuor Eladar and Idril Celebrindal are fictional characters from J. R. R. Tolkien's Middle-earth legendarium. They are the parents of Eärendil the Mariner and grandparents of Elrond Half-elven: through their progeny, they became the ancestors of the Númenoreans and of the King of the Reunited Kingdom Aragorn Elessar. Both characters play a pivotal role in "The Fall of Gondolin", one of Tolkien's earliest stories which formed the basis for a section in his later work, "The Silmarillion", and later expanded and released as a standalone publication in 2018.