Iant Iaur   Old Bridge
Crossing over the Esgalduin on the northern borders of Doriath; also called the Bridge of Esgalduin.

Ibun
One of the sons of Mîm the Petty-dwarf.

Idril
Called Celebrindal 'Silverfoot'; the daughter (and only child) of Turgon and Elenwë; wife of Tuor, mother of Eärendil, with whom she escaped from Gondolin to the Mouths of Sirion; departed thence with Tuor into the West.

Illuin
One of the Lamps of the Valar made by Aulë. Illuin stood in the northern part of Middle-earth, and after the overthrow of the mountain by Melkor the Inland Sea of Helcar was formed there.

Ilmarë
Mightiest of the Maiar, the handmaid of Varda.

Ilmarin

Ilmen
The region above the air where the stars are.

Ilúvatar   Father of All
The Creator, maker of the Ainur, the World, and the Children of Ilúvatar, Elves and Men.
>>>  Erú

Imlach
Father of Amlach.

Imladris   Deep Dale of the Cleft = Rivendell
Elrond's dwelling in a valley of the Misty Mountains.

Imrahil

Imrazor

Incánus   North-spy
Name in the South of Olórin, a word adapted to Quenya from a tongue of the Haradrim (Inkā+nūś).
>>>  Mithrandir, Gandalf

Incomers

Indis
Vanyarin Elf, close kin of Ingwë; second wife of Finwë, mother of Fingolfin and Finarfin.

Ingwë
Leader of the Vanyar, the first of the three hosts of the Eldar on the westward journey from Cuiviénen. In Aman he dwelt upon Taniquetil, and was held High King of all the Elves.

Inziladûn
Elder son of Ar-Gimilzôr and Inzilbêth; afterwards named Tar-Palantir.

Inzilbêth
Queen Consort of Ar-Gimilzôr; of the house of the lords of Andúnië.

Irmo Lórien   Master of Desire
The Vala usually named Lórien, the place of his dwelling.
>>>  Olofantur

Iron Hills
The mountains north of the Carnen River, major habitation of Dwarves.

Iron Mountains
See Ered Engrin.

Isen
See Angren River.

Isengard
Translation (to represent the language of Rohan) of the Elvish name Angrenost.

Isengrim
Isengrim II tenth Thain of the Shire. Begun the excavation of Great Smials.

Isenmouthe
The gab between the Mountains of Ash and the Mountains of Shadow south of the Valley of Udûn.

Isil
Quenya name of the Moon.

Isildur
Elder son of Elendil the Tall, who with his father and his brother Anárion escaped from the Drowning of Númenor and founded m Middle-earth the Númenórean realms in exile; lord of Minas Ithil; cut the Ruling Ring from Sauron's hand; slain by Orcs in the Anduin when the Ring slipped from his finger.
>>>  Heir of Isildur = Aragorn

Isle of Balar
Island in the Bay of Balar where Círdan and Gil-galad dwelt after the Nirnaeth Arnoediad.
>>>  Balar, Tol Eressëa

Istari
The Wizards. See Curunír = Saruman, Olórin = Mithrandir = Gandalf, Radagast, Allatar, Pallando.
>>>  Heren Istarion = Order of Wizards

Isumbras
Thirteenth Thain of the Shire and first of the Took line.

Ithil Stone
The Palantír of Minas Ithil. Obtained by Sauron and used to challenge Saruman and Denethor II.

Ithilien
Fief of Gondor between the Anduin and the Ephel Duáth.

Ithryn Luin   Blue Wizards
Those of the Istari who went into the East of Middle-earth and did not return: Allatar and Pallando.

Ivrin
The lake and falls beneath Ered Wethrin where the river Narog rose.
>>>  Eithel Ivrin