Manannán mac Lir in Celtic tradition
He made his home in the ocean rather than on land, on an island linked with the Otherworld. Manannán mac Lir is an Irish sea deity, son of Lir, and king of the Land of Promise. He was a master of shape-shifting and could grant this power to those he favoured. Unlike a deity tied only to maritime travel, he also governs concealment, magical passage, and the Otherworld.
The quick answers
Who is Manannán mac Lir?
Manannán mac Lir is a Celtic deity associated with the sea and maritime travel; the Otherworld and Tír Tairngire; magic, illusion, and concealment; and passage between the mortal world and the Otherworld.Source
Source
- Encyclopedia of Celtic Mythology and Folklore
What is Manannán mac Lir the god of?
Manannán mac Lir is associated with the sea and maritime travel; the Otherworld and Tír Tairngire; magic, illusion, and concealment; and passage between the mortal world and the Otherworld.Source
Source
- Encyclopedia of Celtic Mythology and Folklore
What family links are recorded for Manannán mac Lir?
Father: Lir.
Manannán mac Lir’s family, at a glance
The names Manannán mac Lir answers to
Mac Lir
Son of Lir, the sea
SourceEncyclopedia of Celtic Mythology and Folklore
Mac Alloit
Son of Alloit or Allód
SourceEncyclopedia of Celtic Mythology and Folklore
Oirbsen
An older personal name for Manannán
SourceEncyclopedia of Celtic Mythology and Folklore
Gilla Decair
The troublesome or difficult lad
SourceEncyclopedia of Celtic Mythology and Folklore
The myths of Manannán mac Lir
2 myths, with sources recorded for each.
Manannán Reclaims Fand
Cú Chulainn lay in a lovesick stupor after Fand appeared to him in a vision and whipped him senseless. A year later, at Samain, he went to the place where the Otherworld could be reached, leaving Emer behind. There he became Fand’s lover. In return, he agreed to help Labraid Lúathlám by fighting three warriors who troubled him. Lí Ban told him that Fand wished to lie with him, and that gold and silver awaited him in her land.
Emer discovered the secret meeting place. When Cú Chulainn and Fand met again, Emer arrived with fifty women carrying sharp knives. Fand warned Cú Chulainn that Emer was leading them. He went to his wife and asked her to lower the weapons. He said that he could not fight the woman he loved. Emer replied that he had dishonoured her before the women of Ireland. Cú Chulainn asked why he could not remain with both women.
Manannán mac Lir then appeared before Fand. He had left her, and only Fand could see him. He asked whether she would stay with Cú Chulainn or return with him. Fand said that she preferred Cú Chulainn, but that he loved another. She would therefore go with Manannán. Manannán shook his magical cloak between them. After this, Cú Chulainn and Fand could never meet again, and Fand went with her husband.
Cú Chulainn grieved when he realised that Fand was gone. He fled to the mountains, neither eating nor drinking, and slept outside in the cold. Emer told Conchobar of his suffering. The king sent warriors to bind Cú Chulainn and bring him home. Conchobar’s druids chanted over him and gave him a drink of forgetfulness. Cú Chulainn drank it and forgot Fand. Emer then took the cup and drank from it as well.

2 sources· checked 2026-08-19
- 1Celtic MythologyT1
- 2the ancient sourcesT1
Quote
“Fand chooses to return to Manannán, who shakes his cloak between her and Cú Chulainn so that they can never meet again.”
the ancient sources
Manannán’s Bargain with Cormac
A warrior came to Tara carrying a branch hung with silver bells. He offered it to King Cormac. The sound filled Cormac with such desire that he promised the warrior the three finest gifts in Ireland whenever he asked for them. After a year, the warrior returned and claimed Ailbe, Cormac’s daughter. Cormac kept his promise. The women of Ireland wept and followed Ailbe, so Cormac shook the branch. At once, they fell asleep. A year later, the warrior came for Cairpre, Cormac’s son. The men of Ireland protested, but Cormac shook the branch again, and they slept. After another year, the warrior demanded Eithne, Cormac’s wife. Cormac gave her up, though grief and jealousy filled him.
A mist then fell over Cormac. When it cleared, he found himself in a strange land. He saw horsemen thatching a house, though their work continually vanished. He saw another man lighting a fire, while the fire consumed everything he brought to it. Cormac came to a fortress, where its lord received him. A pig was prepared for a feast, and Cormac was asked to tell what he had seen since the mist appeared.
The queen said that she had seven cows and seven sheep. The cows gave enough milk for everyone in the Land of Promise, while the sheep provided enough wool to clothe the whole kingdom. More of the pig was cooked. Cormac said that the horsemen represented the skilled workers of the world, whose work disappeared with time. The man tending the fire represented noblemen and farmers, who consumed what they found and had to seek more. The lord then revealed that the fortress was his home. He was the warrior who had brought the branch to Tara and requested the three gifts. He was Manannán son of Ler.
During the test, the magical cup was broken and then became whole again. Manannán gave it to Cormac and sent him, Eithne, Ailbe, and Cairpre to bed. When they awoke, they were back in Tara. The Land of Promise had disappeared, and Cormac’s family had been restored to him.

2 sources· checked 2026-08-19
- 1Celtic MythologyT1
- 2the ancient sourcesT1
Quote
“A magical branch wins Cormac’s promise of three gifts, and Manannán later returns his family with a cup that is broken and made whole.”
the ancient sources
Also mentioned in
Stories elsewhere on MythSource that mention Manannán mac Lir, each on that figure’s page.
- The Birth and Fosterage of Lugh · on Lugh
1 work catalogued
This catalogue brings together reviewed connections and candidates for Manannán mac Lir: reworks first, then references, then names used as atmosphere. A row is not proof by itself. Reviewed connections appear in Overview, beneath a story or under The wider mythology.
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- Manannan Mac LirName only
A catalogue row is not proof by itself. Reviewed connections appear in Overview, beneath a story or under The wider mythology.
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About this page
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2 sources are cited on this page and listed below.
Cite this page
MythSource. (n.d.). Manannán mac Lir. https://www.mythsource.com/figures/manannan-mac-lir
"Manannán mac Lir." MythSource, n.d., www.mythsource.com/figures/manannan-mac-lir.
"Manannán mac Lir." MythSource. n.d. https://www.mythsource.com/figures/manannan-mac-lir.
The mythology summaries and identity fields on this page are grounded in the sources listed above. The appearance table records candidates separately; only confirmed connections are presented as modern retellings in Overview.
