Folk etymology
The origin of the Welsh name "" () is less certain. The local Brythonic name adopted into Latin as Burrium or Burrio was recorded as "Brunebegy" and "Burenbegie" in the 15th century. The modern name is likely an example of the linguistic metathesis common in Welsh Topography. Folk etymology has suggested the name derives from Bryn Buga (Buga's Hill) or Bryn Bugeilio (Shepherding Hill).