Noldor of Eregion

The origins of Eregion are not entirely clear, but it seems to have been originally settled by Galadriel and Celeborn during the eighth century of the Second Age. There were Elves other than the Noldor in that land, but it was that people who had the deepest interest in the crafts of making, and a great friendship grew between the Noldor of Eregion and the Dwarves of nearby Khazad-dûm. For more than six hundred years the new land remained at peace in the western shadows of the Misty Mountains.

After that time a powerful figure naming himself Annatar came to Eregion. Galadriel rejected his friendship, but he had immense knowledge, and his influence over the jewel-smiths grew, and especially over one Celebrimbor, a grandson of Fëanor. Galadriel and Celeborn passed into the east at this time, to settle in the land that would become Lórien, leaving Celebrimbor to become Lord of Eregion.

Under Annatar's guidance, the jewel-smiths of the Gwaith-i-Mírdain began the making of Rings of Power. Of these Rings, Three were made outside the influence and knowledge of Annatar, and so the Elves discovered that their teacher had been Sauron himself, enacting a plan to enslave them through his One Ring. Enraged at being discovered, Sauron sent a force of war into Eriador, overwhelming Eregion and bringing an end to all its people.