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 become the ancestors of the Númenóreans 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; it formed the basis for a section in his later work, The Silmarillion, and was expanded as a standalone publication in 2018.

Eärendil the Mariner and his wife Elwing are characters in J. R. R. Tolkien's Middle-earth legendarium. They are depicted in The Silmarillion as Half-elven, the children of Men and Elves. He is a great seafarer who, on his brow, carried the Morning Star, a jewel called a Silmaril, across the sky. The jewel had been saved by Elwing from the destruction of the Havens of Sirion. The Morning Star and the Silmarils are elements of the symbolism of light, for divine creativity, continually splintered as history progresses. Tolkien took Eärendil's name from the Old English name Earendel, found in the poem Crist A, which hailed him as "brightest of angels"; this was the beginning of Tolkien's Middle-earth mythology. Elwing is the granddaughter of Lúthien and Beren, and is descended from Melian the Maia. Through their progeny, Eärendil and Elwing became the ancestors of the Númenorean, and later Dúnedain, royal bloodline.