Lough Neagh: The "Sacred" Lake of Northern Ireland

Lough Neagh (pronounced "Lok Nay") — the largest freshwater lake in the British Isles (392 km²) — carries an ancient name rooted in Irish cosmology.

Etymology

Lough = Irish loch (lake).
Neagh = from Old Irish nEch / nEach → nEachach → "of the horses" OR from neach = "sacred, holy, divine."

The "sacred" interpretation (neach) is widely cited in Irish toponymy (Joyce, Flanagan). The "horse" derivation (each) links to myth: the lake formed when the magical horse of Eochaidh (or Óengus) overflowed a well.

Mythic Origins

• Eochaidh's well: Fairy well left uncovered → waters rose → lake formed. Horse drowned or escaped.
• Óengus the Dagda's son: Similar well-overflow tale.
• Lúgh's lake: Associated with god Lugh (Lughnasadh festival).

Physical Reality

• Shallow (avg 8.9m, max 34m)
• Fed by 6 major rivers (Upper Bann, Blackwater, Moyola, Six Mile Water, Main, Ballinderry)
• Drains via Lower Bann to Atlantic
• Eutrophic, commercial eel fishery, sand extraction, wildfowling
• Ramsar site, SPA, ASSI designations

Cultural Weight

Central to Ulster geography. "The Lough" in local speech. Border of 5 counties (Antrim, Armagh, Down, Londonderry, Tyrone). Lough Neagh Partnership manages cross-jurisdictional issues.

Whether "sacred lake" or "horse lake," the name carries millennia of story—older than any shore development.