It has been suggested that this article or section be merged with Geas. (Discuss)

A geasa is a vow or obligation placed upon a person (usually a hero, such as Cuchulainn) in Irish mythology. Traditionally, the doom of the hero comes about due to his violation of such geasa, usually by accident. Wikipedia does not have an article with this exact name. ... A geas (also geis), has two interpretations in Irish mythology and folklore. ... This article needs to be wikified. ... Young Cúchulainn, 1912 illustration by Stephen Reid. ... The mythology of pre-Christian Ireland did not entirely survive the conversion to Christianity, but much of it was preserved, shorn of its religious meanings, in medieval Irish literature, which represents the most extensive and best preserved of all the branches of Celtic mythology. ...

There is a considerable similarity between geasa (which are a phenomenon of Irish Celtic mythology) and the foretold deaths of heroes in Welsh mythology. This is not surprising given the close origins of all the variants of Celtic mythology. Welsh mythology, the remnants of the mythology of the pre-Christian Britons, has come down to us in much altered form in medieval Welsh manuscripts such as the Red Book of Hergest, the White Book of Rhydderch, the Book of Aneirin and the Book of Taliesin. ... It has been suggested that Myth be merged into this article or section. ...

Geasa is also the name of a celtic metal band, see Geasa (band). Celtic metal is a sub-genre of black metal. ... Geasa is an Irish Celtic metal band. ...