Means "hiding place of the pig" in Welsh. In Welsh legend he was the lover of
Olwen the daughter of the giant Yspaddaden. Before the giant would allow Culhwch to marry his daughter, he insisted that Culhwch complete a series of extremely difficult tasks. Culhwch managed to complete them, and he returned to marry Olwen and kill the giant. This tale appears in the Mabinogion, a collection of tales from Welsh myth.