What is "wyllow"

Wyllow was a Cornish hermit saint and martyr whose existence was reported by William Worcester.

He was said to have been born in Ireland and was reputedly beheaded by Melyn ys Kynrede in the parish of Lanteglos, near Fowey. Supposedly, he then carried his head for half a mile to St Willow's Bridge, where a church was later built in his honour. Nicholas Roscarrock gives his feast day as 3 June. His dates of birth and death are unknown, though it is likely that he lived in the 6th century.