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Manannán mac Lir, a MythSource painting
Celtic

Manannán mac Lir

Sea God · Lord of the Otherworld · King of the Land of Promise

01Identity

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.

Top questions
  • 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, passage between the mortal world and the Otherworld.
    Source

    Source

    • Encyclopedia of Celtic Mythology and Folklore
  • What is Manannán mac Lir the god of?

    the sea and maritime travel, the Otherworld and Tír Tairngire, magic, illusion, and concealment, 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.
02Family

Parents above, children below, and the figure’s consorts named in between, the same family data as the fact box, laid out as a chart instead of a field list.

Lir
Manannán mac Lir
03The names

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

04The myths

2 myths, each traced to its primary text and corpus sources.

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.

Manannán Reclaims Fand, a MythSource painting of the scene

In the modern world

No modern rework confirmed yet.

2 sources· checked 2026-08-19

  1. 1Celtic MythologyT1
  2. 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

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.

Manannán’s Bargain with Cormac, a MythSource painting of the scene

In the modern world

No modern rework confirmed yet.

2 sources· checked 2026-08-19

  1. 1Celtic MythologyT1
  2. 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

The myths across MythSource where Manannán mac Lir features, each on that figure’s page.

The film

The Underdrawing video on Manannán mac Lir embeds here once it publishes.