YSBADDADEN BENKAWR.(W) See Yspaddaden Pencawr.

YSGITHYRWN.(W) "The Chief Boar" from whom Culhwch has to bring a tusk so that Yspaddaden might shave.

YSPADDADEN PENCAWR>(W)."Chief Giant," who's daughter is Olwen.
In the story of"Culhwch and Olwen," the stepmother of Culhwch ap Cilydd ordains that he will never win a wife until he wins the love of Olwen.
Culhwch sets out to the court of his cousin, Arthur, and requests that Arthur help him in his quest to find and win Olwen.
For ayear Arthur's messengers scour the country until news of her whereabouts is obtained.
Then Cei,Bedwyr,Cynddelig,Cyfarwydd,Gwrhry Gwalstawd Ieithoedd,Gwalchmei,and Menw set out with Culhwch to the great fortress of the giant. On the way they meet a shepherd, Custennin, and stay with him. With his wife's connivance, Olwen comes to meet them. But she cannot leave without her fathers permission.

So Culhwch and companions enter the fortress, slaying the watchdogs and gatemenm. In the presence of Yspaddaden they declair their quest.
Servants have to lever the giant's eyelids up with support so that he might look on Culhwch.
In many ways he is simmilar to the Fomorii, Balor of the Evil Eye, who also has to have his eyelid levered up. But a glace of Balor's eye withers men. This is not the case of Yspaddaden.Balor, too, does not want his daughter Ethlinn to have a relationship with a man, for it has been prophesied that he will be slain by his grandchild. The grandchild in Balor's case was Lugh Lamhfada. Yspaddaden, however, promises to give his answer to Culhwch if he and his companions come back on the following day, but as they leave he throws a poisoned spear at them. Bedwyr catches it and throws it back, catching himin the knee. A similar exchange takes place on each of the next three days.
The giant is finally wounded in the chest. Then Culhwch returns the spear into the giant's eye. It is only then that Yspaddaden agrees to give Olwen to Culhwch on condition that he perform 13 difficult tasks . Further, there are 26 subsidiary tasks to be undertaken to accomplish the original 13. With the help of Arthur and his warriors, supernatural personages, and allies ranging from ants to magical powers, Culhwch performs the tasks, Yspaddaden is slain, and Olwen becomes his wife...