1) Welsh mythology 
A tynged (`doom, fate, destiny`, plural `tynghedau`) is the Welsh equivalent of the Irish geis, the most famous of which were those that Arianrhod placed on her son Lleu Llaw Gyffes in the fourth of the Four Branches of the Mabinogi, the Mabinogi of Math fab Mathonwy. ...
A magical taboo or restriction placed on a hero in Welsh literature, the Welsh equivalent to the Iri