The phrase Tre Pol and Pen is used to describe people from or places in Cornwall, England. The full rhyming couplet runs: "By Tre, Pol and Pen shall ye know all Cornishmen". Many Cornish surnames and place names still retain these words as prefixes. Tre means a settlement or homestead; Pol, a pond, lake or well; and Pen, a hill or headland.
Tre is by far the most common beginning among the names of old Cornish families derived from their habitations.
Tre, in the Cornish or British language, signifies a town, village, or dwelling, as
It would be entering into a very wide field, to attempt to give the etymology of Cornish names; and, indeed, after all, it must be very unsatisfactory, for the Cornish etymologists are not at all agreed in their interpretation of them, as is evident from many instances (fn.