In the fiction of J. R. R. Tolkien, the House of Bëor was the oldest of the Three Houses of Men that had allied with the Elves in the First Age.

Bëor the Old, originally named Balan, the founder of the House, was the first to lead Men across the Ered Luin (Blue Mountains) into Beleriand, in the First Age. He and his people were met by Finrod Felagund, who guided them to settle in Estolad east of Doriath. Bëor himself took service with Felagund in Nargothrond. The name Bëor meant vassal in the Bëorian tongue.

Baran the eldest son of Bëor, inherited the leadership. Bëor's second son was Belen.

Bereg, a grandson of Baran, was dissatisfied with Estolad, and led part of the people away to parts unknown, disappearing from the histories. It is possible some of his descendants were the ancestors of the later Men of Eriador.

Boron was a son of Baran.

Boromir was a son of Boron. The later Boromir of Gondor was named after him. Boromir was granted the land of Ladros in Dorthonion as a fief, and his house removed there.

Bregor was a son of Boromir and Andreth was Boromir's daughter.

Bregolas, who died in the Dagor Bragollach, and Barahir were sons of Bregor.

Beren was a son of Barahir.

Baragund was a son of Bregolas.

The House of Bëor ceased to exist as an independent House after the Dagor Bragollach, but in the Second Age some families of Númenor still spoke Adûnaic with a notable Bëorian accent.

Family tree of the House of Bëor and its descendants

 Bëor the Old | -------------------------- | | Baran Belen | : ----------- : | | : Boron Baranor : | | : Boromir Bereg Belemir = Adanel | | ------------ | | | | Andreth Bregor Beren | | ______________ | | | | Bregolas Barahir = Emeldir | | ---------------- | | | | Baragund Belegund Beren Erchamion = Lúthien | | | Morwen = Húrin Rían = Huor Dior = Nimloth | | | ------------- | -------------- | | | | | | | Túrin Lalaith Nienor Tuor = Idril | | | | | | | Eärendil = Elwing Eluréd Elurín | ------------------------------------- | | Elros Elrond = Celebrian | | ------------------------ ---------------- | | | | | Kings of Númenor Lords of Andúnië | | | : | | | Elendil | | | | | | | ------------------- | | | | | | | | Kings of Gondor Kings of Arnor | | | : | | | Kings of Arthedain | | | : | | | Chieftains of the Dúnedain | | | : | | | Aragorn = Arwen Elladan Elrohir | ---------------------- | | Eldarion Numerous daughters : Kings of Gondor and Arnor