Telimektar was the son of Tulkas according to the early version of the legendarium in The Book of Lost Tales. Later on, he only survived as a constellation, but eventually lost his original name which, however, reappeared as a name of Telumehtar Umbardacil, 28th King of Gondor.
Telimektar is first mentioned in an early story, The Chaining of Melko. Telimektar was "but just war-high" when he fought at his father's side against Melko in the war which ended with the captivity of the Enemy. Telimektar had "a long sword girt about his waist by a silver girdle."
Later on, in the tale The Theft of Melko, in the darkness after the darkening of the Trees Telimektar is pursuing Melko with other Gods (as they were then called) and "his face and weapons gleam as silver in the dark".
In The Tale of the Sun and Moon Telimektar conversed into a constellation is mentioned in a representation of the Heavens when Lindo relates to Eriol a speech of Manwë. The star Nielluin (Sirius, called Helluin in The Silmarillion) is "nigh the foot of Telimektar son of Tulkas whose tale is yet to tell."
Alas, the tale was never properly told. Telimektar's last appearance in Tolkien's mythology is in The History of Eriol or Ælfwine and the End of the Tales.:278-334
In the conclusion of the whole story that was to become Quenta Silmarillion, later totally rejected, Melko breaks away after the breaking of Angamandi (later: Angband) and goes to Tol Eressëa in order to create dissension among the Elves. The Gods do not interfere, but Tulkas decides to privily send Telimektar to aid the Elves.
Telimektar, with his silver sword, and Ingil (son of Inwë, king of the Eldar in Kôr or Valinor) surprise and wound Melko and then pursue him until Melko climbs to the great Pine of Tavrobel. There he must stay and Telimektar and Ingil (or Gil, now the star Sirius) remain in the sky in guard against Melko's return.:281
The last statement about Telimektar concerns with Telimektar's shape in the Heavens: the constellation should only be "the image of Telimektar in the sky?" and the stars are given to him by Varda so that the Gods would know that he still is watching Melko. Also "he has diamonds on his sword-sheath, and this will go red when he draws his sword at the Great End".:281
Then the end of the story was entirely changed and the character of Telimektar was also dropped. But as an echo of Telimektar, in the two following versions of the Silmarillion, the army of the Valar marches to the War of Wrath, commanded by Fionwë, son of Tulcas. Later on, Fionwë was called son of Manwë, and finally he was transformed to Eönwë, Manwë's herald (as in The Silmarillion). Of Telimektar remained only the mention of Telumehtar as a name of Orion in the Appendices to The Lord of the Rings.
 Names and etymology
Telimektar also appears as an entry in the Qenya Lexicon, an early representation of the Elvish language. The entry is titled Telimektar, Telimbektar and the Gnomish form is told to be Telumaithar. In the Valar name-list Telimektar is also called Taimondo or Taimordo, in Gnomish Daimord.
The first element Teli- refers to the sky. Cf. telluma "dome (of Varda)", telimbo 'sky', from the root TELE- 'cover in', see also: TEL-, TELU-. The second element –'mektar' probably derives from the root MAKA. The end of the name is thus related to the name of another "lost vala", Makar ("warrior") and is also seen in the other name of the constellation Orion, Menelmacar.
The other name of Telimektar, Taimondo/Taimordo, is derived from the word taimë, taimië ("sky"), but the end does not refer to warrior, being a loan from Gnomish word mord ("shepherd"). Thus the name of the constellation was also conceived as "Shepherd of the Sky" (Taimavar in Qenya).
For the sake of completeness note also the spelling Telumaith (see below), and Taimonto.:281,302
 On Telimektar and his son Lúthien
In a comment to The History of Eriol or Ælfwine,:302 Christopher Tolkien treats the origin of the name of Lúthien, which originally was the name given to the mariner Ælfwine of England by the elves. Christopher refers to a note coeval to the sketches of the story of Eriol and Ælfwine. In that note "Lúthien or Lúsion was son of Telumaith (Telumektar)". Ælfwine got his name because he "loved the sign of Orion, and made the sign". The name Lúthien is here explained to mean "wanderer". This storyline is not further developed or even mentioned neither does this interpretation of the name Lúthien appear elsewhere.
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, "IV. The Chaining of Melko"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, "VI. The Theft of Melko and the Darkening of Valinor", p. 154
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, "VIII. The Tale of the Sun and Moon", p. 182; cf. p. 200
- ↑ 4.0 4.1 4.2 4.3 4.4 J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part Two, "VI. The History of Eriol or Ælfwine and the End of the Tales"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "II. The Earliest 'Silmarillion' (The 'Sketch of the Mythology')", pp. 11-75
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "II. The Earliest 'Silmarillion' (The 'Sketch of the Mythology')", p. 37
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "III. The Quenta: [Section] 17", p. 149
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Quenta Silmarillion: Of the Voyage of Eärendil and the War of Wrath"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix E, "Pronunciation of Words and Names", "Consonants" (entry concerning the pronunciation of "H" in the Elvish languages)
- ↑ 10.0 10.1 10.2 J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, Appendix: Names in the Lost Tales – Part I, p. 268
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The War of the Jewels, "Part Four. Quendi and Eldar: Appendix D. *Kwen, Quenya, and the Elvish (especially Ñoldorin) words for 'Language': Note on the 'Language of the Valar'", p. 399
- ↑ 12.0 12.1 J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, Appendix: Names in the Lost Tales – Part I, pp. 258, 268