Saint Gwinear was a Celtic martyr, one of only two early Cornish saints whose biographies survived the Reformation. The Life of Gwinear was written in the early 14th century by a priest named Anselm, and has sometimes been printed among Saint Anselm's works.
Born in Ireland with the Irish name of Fingar, he was converted to Christianity by Saint Patrick and after spending time in Brittany went with 7 (or 777) companions to Cornwall, landing at Hayle, where he was martyred by King Teudar.
The Victorian clergyman, hagiographer and antiquary Sabine Baring-Gould believed that an Irish group, driven from their homeland in Ossory in the fifth century, invaded Penwith (="pen-gwaeth", the "bloody headland"), and that the legend of Gwinear was a distorted recollection of these events.
Footnotes
Chiquitita, tell me what's wrong
You're enchained by your own sorrow
In your eyes there is no hope for tomorrow
How I hate to see you like this
There is no way you can deny it, I know
I can see that you're oh so sad, so quiet
Chiquitita, you and I know
How the heartaches come and they go and the scars they're leaving
You'll be dancing once again and the pain will end
You will have no time for grieving
Chiquitita, you and I cry
But the sun is still in the sky and shining above you
Let me hear you sing once more like you did before
Sing a new song, Chiquitita
Try once more like you did before
Sing a new song, Chiquitita
Try once more like you did before
Sing a new song, Chiquitita