Lebennin was largely populated by Men of mixed blood, as many Men of Lebennin traced their ancestry to the forgotten 'Men of the Mountains' that had been displaced from the White Mountains by the Númenóreans.
During the War of the Ring, Lebennin did not send many Men to the aid of Minas Tirith as it was under attack by the Corsairs of Umbar. Aragorn leading the Grey Company and the Dead Men of Dunharrow arrived to Lebennin on 11 March and liberated it.
 Portrayal in adaptations
1982-97: Middle-earth Role Playing:
- Lebennin is the most populous province in Southern Gondor. Its capital is Pelargir, and other landmarks in the region include Fanuilond (town), Glinduin (river) and Serni (river).
1995-8: Middle-earth Collectible Card Game:
- Lebennin is a region which links to Anórien, Belfalas, Lamedon, and the Mouths of the Anduin. "Men of Lebennin" is a Man Faction, playable at the site Pelargir.
2014: The Lord of the Rings Online:
- For game development purposes, Lebennin was divided into Lower Lebennin and Upper Lebennin, divided by Pelargir and the river Sirith. Lower Lebennin was the eastern-most area in Central Gondor and Upper Lebennin was the western-most area in Eastern Gondor. Dor-en-Ernil lay to the west across the river Gilrain and Lossarnach lay to the east across the river Erui. The emblem of Lebennin was five wavy blue lines representing the Five Rivers on a white field. Aside from Pelargir, major settlements in Lebennin included "Ost Anglebed", "Glaniath", and Tumladen, along with Linhir which was also part of Dor-en-Ernil. The smaller settlements, some of which had fallen to enemy forces before the breaking of the Siege of Gondor, included "Ethilorn", "Sarnhad", "Malbarth", "Aerthir", "Lornost", "Erynos", and "Halach". A local tradition in Lebennin was the offering of gift baskets to the rivers in honor of the Five Sisters of Lebennin, though by the end of the Third Age few believed the Sisters were any more than a myth.
- ↑ J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "Map of Rohan, Gondor, and Mordor"
- ↑ J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "Minas Tirith"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix B, "The Great Years"
- ↑ J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Last Debate"
- ↑ J.R.R. Tolkien, "Unfinished index for The Lord of the Rings", in Wayne G. Hammond and Christina Scull (eds), The Lord of the Rings: A Reader's Companion, p. 274
- ↑ J.R.R. Tolkien, "Words, Phrases and Passages in Various Tongues in The Lord of the Rings", in Parma Eldalamberon XVII (edited by Christopher Gilson), p. 95
- ↑ Compound Sindarin Names in Middle-earth at Tolkiendil.com (accessed 27 June 2011)
- ↑ Jason Beresford, Anders Blixt, Mats Blomqvist, Gunnar Brolin, Jeff Hatch, Tim Innes, Åke Rosenius, Martin Rundkvist, Erik, Rågvik, Chris Seeman, Magnus Seter (1996), Southern Gondor: The Land (#2021)