Heir of Durin

				Durin I The Deathless
				Durin II
				Durin III
				Durin IV
				Durin V
				Durin VI
				Náin I
				Thráin I
				Thorin I
				Glóin
				Óin
				Náin II
			Dáin I		Borin
		Thrór	Frór	Grór
		Thráin II		Náin
	Thorin II	Frerin	Dís	Dáin II
				Thorin III
				Durin VII

The descent of the House of Durin, showing all known Heirs of Durin the Deathless and their lines of descent. Note that the existence of Durin II, IV and V are inferred, but we have no specific details about those Heirs.

The Dwarf-clan of the Longbeards was descended from the oldest of all the Dwarves, Durin the Deathless. Despite his title, Durin lived and died before the end of the First Age, but he founded a line that would rule in Khazad-dûm into the Third Age. The line of the Heirs of Durin is not recorded in any detail before the closing millennium of the Third Age, but from the time of Durin VI (who died in III 1980), we have a complete record of thirteen Kings of Durin's Folk down to Thorin III, who fought in the War of the Ring.

A peculiar feature of the royal line was the occasional appearance among Durin's descendants of an Heir so like their forefather that he was given the same name, and considered by the Dwarves to be Durin the Deathless reborn. Of these the most famous were Durin III, who forged a great friendship with the jewelsmiths of Eregion, and Durin VI, who was slain by the Balrog of Khazad-dûm. Some accounts also speak of a Durin VII, the last Durin of the line, who reclaimed Moria and re-established Khazad-dûm.