Eärendil:

Eärendil was the son of Tuor and Idril, therefore one of the Half-Elven. He was born in the year 541 of the First Age of the Sun, in Gondolin. Eärendil married Elwing and thus united the two lines of the Half-Elven, because Elwing was the granddaughter of Beren and Lúthien. Their sons were Elrond and Elros.

When the surviving sons of Fëanor attacked to recover the Silmaril, Eärendil and Elwing fled into the West, to beg for aid from the Valar for Middle-Earth. It was only due to the Silmaril that they bore that they gained access. Due to the fact that none from Middle-Earth at that time were permitted to enter the Blessed Realm, Eärendil was set in the sky with they Silmaril as a star. During the final wars in Beleriand, he slew Ancalagon the Black. Eärendil sails the skies still, though he is now known as Venus.