Morphology: croes+pen+maen
Phonetic: kroys-pen-mine
"Croes" is the Welsh word for a cross and is used here in the context of a crossroads near the village of Penmaen. The name dates back at least to the early 17th century when it was Crosspenmay 1611 and again by 1817, le Crosse pen Maine 1626-7, Cross Pen Main c1790 and 1820 and Croes Penmaen in 1833.