A ''tynged'' ("destiny, fate", ''plural tynghedau'') is the Welsh equivalent of the Irish '' geas'', similar to being under a vow, curse or spell. The most famous example is that placed by Arianrhod on her son

Lleu Llaw Gyffes Lleu Llaw Gyffes (), sometimes incorrectly spelled as Llew Llaw Gyffes, is a hero of Welsh mythology. He appears most prominently in the Fourth Branch of the Mabinogi, the tale of Math fab Mathonwy, which tells the tale of his birth, his marriag ...

in the fourth of the

Four Branches of the Mabinogi The ''Four Branches of the Mabinogi'' or are the earliest prose stories in the literature of Great Britain, Britain. Originally written in Wales in Middle Welsh, but widely available in translations, the is generally agreed to be a single work i ...

, the Mabinogi of Math fab Mathonwy, in which his mother doomed him to never have a human wife. In addition, Lleu was destined to die neither "during the day or night, nor indoors or outdoors, neither riding nor walking, not clothed and not naked, nor by any weapon lawfully made." When his magically created wife,

Blodeuwedd Blodeuwedd (; Welsh "Flower-Faced", a composite name from ''blodau'' "flowers" + ''gwedd'' "face"), is married to Lleu Llaw Gyffes in Welsh mythology. She was made from the flowers of broom, meadowsweet and oak by the magicians Math and Gwydio ...

, wanted to learn how to kill him in order to be with her lover, she convinced him to show her how he could theoretically be killed at dusk while stepping out of a river onto a riverbank while sheltered by a roof and putting one foot on a goat, and so on.

Sources

* Welsh mythology {{Celt-myth-stub