Britto

Etymology
As from the 1st century, from , used by , earlier   or , used by  (4th century ) of the entire archipelago now known as the British Isles.

The Ancient Greek name is ultimately from a ethnonym, reconstructed as early , perhaps from a , , whence 🇨🇬, 🇨🇬, , from.

Noun

 * 1) An inhabitant of Britain, a Briton.
 * 2) An inhabitant of Brittany, a Breton.

Descendants
Because was settled at the end of the Roman era by migrants from Britain, the original descendants of  often have the meaning "an inhabitant of Brittany", with a later reborrowing from Classical Latin being used to form the word for "an inhabitant of Great Britain".