Aelin-uial, also known as the Fens of Sirion, was a marshy confluence of the river Aros into Sirion, south of Doriath.[1][2]


The Aelin-uial was the maze of lakes and fens which formed where the river called Aros met Sirion, before it fell beneath the Andram. These were lands heavy with enchantment, both from the girdle of Melian guarding Doriath to the North, but also from the power of Ulmo that was very mighty in the waters of the river Sirion. The Aelin-uial was under the total control of the Sindarin kingdom of Doriath. The march wardens of Thingol had secret ferries among the reeds, so that they could cross between the Sirion's eastern and western banks unseen. At the southern end of the Aelin-Uial, the Sirion's waters collected together once more from the many paths they took through the Marshland and, at the place called the Falls of Sirion, fell a very loud waterfall down into the earth.[1]

It was here that Turgon and Finrod were given the idea of building their hidden fortresses at Gondolin and Nargothrond. This idea was given to them by Ulmo, while they dreamed.[3]

As Beren Erchamion left Doriath, he passed through Aelin-uial and proceeded to the Falls of Sirion.[4]

In search for Túrin Turambar, Morwen and Nienor followed Mablung, who later brought them to the hidden ferries of the elves.[5] After the release of Húrin, he passed through the Aelin-uial and entered Doriath, where he met Elu Thingol and returned the Nauglamir.[6]

It was destroyed in the War of Wrath, which occurred at the end of the First Age.[7]


The name Aelin-uial is Sindarin which means "Twilight Meres" from the words aelin ("lake, pool") and uial ("twilight").[8]

Its earlier name was the Gnomish Hithliniath, "Pools of Mist", which was later changed to Umboth-muilin.[9]

Other names

It was also called the "Meres of Twilight", "Twilight Meres", or "Twilit Meres".


Foreign Language Translated name
Amharic ዓአሊን፡ኡኢኣል
Arabic إيلينءويال ?
Armenian Աելին-ուրալ
Belarusian Cyrillic Аелін-уіал
Bengali আএলিন্-উইঅল
Bulgarian Cyrillic Аелин-уиал
Georgian აელინ-უიალ
Greek Αελιν-υιαλ
Gujarati આએલિન્-ઉઇઅલ
Hebrew איילין אויאל
Hindi आएलिन्-उइअल
Hungarian Félhomály-tavak
Kannada ಏಲಿನ್-ಯುಯಾಲ್
Kazakh Аелін-ұіал (Cyrillic) Aelin-uial (Latin)
Kyrgyz Cyrillic Аэлин-уиал
Macedonian Cyrillic Аелин-уиал
Marathi आयलीन-उयल
Mongolian Cyrillic Аелин-уиал
Nepalese आएलिन्-उइअल
Pashto آېلین-ویال
Persian اهلینءویال ?
Punjabi ਆਇਲਿਨ-ਯੂਯਲ
Russian Аэлин-уиал
Sanskrit आएलिन्-उइअल्
Serbian Аелин-уиал (Cyrillic) Aelin-uial (Latin)
Sinhalese ආඑලින්-උඉඅල්
Tajik Cyrillic Аелин-уиал
Tamil ஆஎலிந்-உஇஅல்
Telugu ఆఎలిన్-ఉఇఅల
Ukrainian Cyrillic Аелін-уіал
Uzbek Аелин-уиал (Cyrillic) Aelin-uial (Latin)
Yiddish אַעלין-ויאַל ?


  1. 1.0 1.1 The Silmarillion, Quenta Silmarillion, Chapter XIV: "Of Beleriand and its Realms"
  2. The Atlas of Middle-earth, The First Age, The Elder Days, "Beleriand and the Lands to the North"
  3. The Silmarillion, Quenta Silmarillion, Chapter XIII: "Of the Return of the Noldor"
  4. The Silmarillion, Quenta Silmarillion, Chapter XIX: "Of Beren and Lúthien"
  5. The Silmarillion, Quenta Silmarillion, Chapter XXI: "Of Túrin Turambar"
  6. The Silmarillion, Quenta Silmarillion, Chapter XXII: "Of the Ruin of Doriath"
  7. The Silmarillion, Quenta Silmarillion, Chapter XXIV: "Of the Voyage of Eärendil and the War of Wrath"
  8. The Silmarillion, Appendix: Elements in Quenya and Sindarin names
  9. The History of Middle-earth, Vol. XI: The War of the Jewels, Part Two: The Later Quenta Silmarillion, XI: "Of Beleriand its Realms"
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