What Is The Meaning Of Penrose?

What Is The Meaning Of Penrose? Cornish and Welsh: habitational name from any of the places called Penrose, in ten parishes of Cornwall, several in Wales, and in Herefordshire near the Welsh border. All are named with Celtic pen ‘head’, ‘top’, ‘end’ + ros ‘heath’, ‘moor’. Why is it called Penrose triangle? An optical illusion