Usual English form of the Welsh name Myrddin. The name is most famous as that of the legendary magician who guides the destiny of King Arthur. The English form has been distorted by mediation through Old French sources, which associated the second element with the diminutive suffix -lin.
English: habitational name from places in Devon and Cheshire, named in Old English as ‘common wood or clearing’, from (ge)mǣne ‘common’, ‘shared’ + lēah ‘woodland clearing’. The surname is still chiefly found in the regions around these villages.