Elcmar
In its own language: Ealcmhar
Modern spelling Ealcmhar; one suggested meaning is 'The Evil One'.
An Irish mythic steward, husband of Boann, tricked out of his dwelling
Elcmar is a figure in Irish mythology, a member of the Tuatha Dé Danann and husband of Boann. He serves as the Dagda's chief steward, is named a judge and given a horse title in the Dindsenchas, and loses his dwelling at Brugh na Boinne to Oengus mac Og through a trick.
- The Dindsenchas names him a judge and gives him a title linked to horses.
- He serves as chief steward to the Dagda in the Yellow Book of Lecan.
- Oengus wins the Brugh na Boinne from him after a Samhain duel.
- His daughter Englec is carried off by Midir, whom Elcmar later kills.
- Oengus kills Elcmar in revenge for Midir's death.
What it is
Elcmar is a named figure in Irish mythology and belongs to the Tuatha Dé Danann, the divine people of those tales. He is married to Boann, goddess of the River Boyne, and serves the Dagda as chief steward. The Dindsenchas names him a judge and gives him a title linked to horses. In the same portrait he carries a cloak, a brooch of gold, and a fork whose wood is white hazel. His story is tied to the Brugh na Boinne, the dwelling he loses to Oengus mac Og. He is a mythic character, not a recorded ritual specialist.
Where it comes from
Elcmar's story is carried in the Yellow Book of Lecan, and the Dindsenchas also names him. One suggestion makes him a second name for Nuada. Some accounts mix him up with Nechtan, the man normally married to Boann. A separate line of thought reads his name as The Evil One. The tales place him among the Tuatha Dé Danann and around the Boyne. His modern spelling is Ealcmhar. These are learned suggestions and variant traditions, not a single fixed origin.
Tools and materials
The Dindsenchas gives Elcmar a cloak, a brooch of gold, and a fork whose wood is white hazel. The brooch is the metal item; the fork is the wooden one. The cloak completes the set. All three appear in the same passage that names him a judge and gives him a horse title. They sit within his portrait as a figure of rank.
Elcmar, drawn and placed
- Living
- Revived
- Fading
- Historical
- Legendary
- Performed
- Lineage
- Irish mythology, Tuatha Dé Danann
- Timing
- Imbolc and Samhain in the tale
What it is for
Within the cycle, Elcmar's role is tied to household and land. He is the Dagda's steward and Boann's husband, and his household is where the Dagda's affair with Boann begins. Later his holding at the Brugh na Boinne becomes the prize Oengus mac Og wins. The tale uses him as the displaced husband and the landholder who loses his seat. His daughters also enter the story: Englec is carried off by Midir, and Fea becomes the wife of Neit.
Peoples and places
Elcmar belongs to Irish mythology and is counted among the Tuatha Dé Danann. His story is set around the River Boyne, where his wife Boann is the river goddess, and at the Brugh na Boinne, the dwelling he holds. The Yellow Book of Lecan preserves one account, and the Dindsenchas also names him. These are the Irish contexts in which the tales place him. He is a figure of the divine race rather than a named human community.
At a glance: who, where and when
Peoples
What people believe
The tales assume a world of gods and divine peoples. The Tuatha Dé Danann are a divine race; the Dagda is one of their most powerful members; Boann is a river goddess; and the Sidhe have residences called sitheans. The Dagda can hold the sun in place and can keep hunger, thirst, and darkness from a traveller. Oengus wins the Brugh through a verbal trick that turns on Old Irish having no indefinite article. The story works with mythic time and with the power of a god over the day itself.
When it is done
Two festivals mark the narrative. The Dagda sends Elcmar on an errand around Imbolc, the point at which Boann becomes pregnant. On Samhain, Oengus challenges Elcmar for the Brugh. The pregnancy is compressed: the Dagda holds the sun still for nine months so that Boann carries the child in what seems a single day. For Elcmar, the journey is made to feel like one day by keeping hunger, thirst, and darkness from him. Festival time and altered time both drive the plot.
How scholars and sceptics see it
Several learned suggestions surround Elcmar. One makes him a second name for Nuada. Another reads his name as The Evil One. Some accounts mix him up with Nechtan, the man normally married to Boann. The Dindsenchas calls him a judge and gives him a horse title, which has prompted the idea that horses are part of his character, while the name reading points in another direction. These are presented as suggestions and confusions, not as settled identifications.
Compare and confuse
Elcmar is sometimes mixed up with Nechtan, the man normally married to Boann, and one suggestion makes him a second name for Nuada. The tale of Boann's pregnancy is compared in the account to the Greek story of Alcmene. His modern spelling is Ealcmhar, and an older variant is Ecmar. These are the main comparisons and name forms the tale offers.
Days linked to Elcmar
Questions people ask about Elcmar
Who is Elcmar?
Elcmar is a figure in Irish mythology and one of the Tuatha Dé Danann. He is Boann's husband and the Dagda's chief steward. The Dindsenchas names him a judge and gives him a title linked to horses.
Where does his story come from?
It is carried in the Yellow Book of Lecan, and the Dindsenchas also names him. The setting is Irish myth, around the River Boyne and the Brugh na Boinne.
Why does he lose the Brugh na Boinne?
The Dagda tells Oengus mac Og how to trick him. On Samhain Oengus defeats Elcmar in a duel and spares him in exchange for the Brugh for day and night. Old Irish has no indefinite article, so the phrase also means always.
What happens in the story of Boann's pregnancy?
The Dagda sends Elcmar on an errand around Imbolc. Boann becomes pregnant. The Dagda holds the sun still for nine months, or keeps hunger, thirst, and darkness from Elcmar, so the absence seems to last one day.
Who kills Elcmar?
Elcmar kills Midir after Midir carries off Englec, Elcmar's daughter. Oengus then kills Elcmar in return. Englec becomes Midir's lover.
Good reading and sources
The facts on this page come from the Wikipedia article "Elcmar", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryJaadu rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. Names and customs differ from one community to the next, and some knowledge is closed to outsiders and left out here. This page describes belief and practice. It does not say that any of it works, it is not a how-to, and it is not medical advice. If something is wrong, tell us. Last refreshed 2026-10-18.
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