Dor Firn-i-Guinar

Dor Firn-i-Guinar or the Land of the Dead that Live was a countryside in the southern Ossiriand in East Beleriand.

It was well known for being the region surrounding Tol Galen where Beren and Lúthien lived again after being released from the Halls of Mandos. It was so named in honour of Beren and Lúthien, the dead who had returned to life.

Before Beren and Lúthien arrival
Being a part the Ossiriand, this country was no doubt inhabited by the Nandor and their later related brethren the Laiquendi, the Green-elves after the death of their lord Denethor in the First Battle of Beleriand. The extent of the Elven population was probably sparse and hidden at this time.

After Beren and Lúthien arrival
Some time around FA 469 having been granted a second but mortal life at the behest of Manwë under Eru, Beren and Lúthien returned to Middle-earth from the Halls of Mandos and settled on the isle of Tol Galen in the southern Ossiriand. It was from this time that the Eldar began to call the area Dor Firn-i-Guinar 'Land of the Dead that Live'. This news spread amongst the Laiquendi and the couple was regarded in high honour. Dior, the son of Beren and Lúthien was born in this country. After Beren recovered the Nauglamir and the Silmaril from the Dwarves of Nogrod after the Battle of Sarn Athrad, Lúthien wore the beautiful treasure openly as a necklace. During this time, Dor Firn-i-Guinar shown with a light and beauty like that only seen in Valinor and apparently remained so until the final deaths of Beren and Lúthien.

Etymology
Dor Firn-i-Guinar was Sindarin.