A modern English coinage influenced by British/Brittany, referring to Britain or the Briton people.
Brittish is an exceptionally rare given name, almost certainly an inventive respelling of the adjective 'British,' used as a proper name in the tradition of American creative naming. The underlying word derives from the Latin *Brittones* and Old French *Breteis*, referring to the Celtic inhabitants of Britain, ultimately connected to the ancient tribal name whose precise etymology remains debated — possibly from a Celtic root meaning 'painted' or 'tattooed,' referencing the body decoration practices Romans described.
The island name itself may connect to the Proto-Celtic *Pritanī*, recorded by the Greek explorer Pytheas around 325 BCE. As a given name, Brittish operates in a space that linguistic scholars call 'neolocalism' — the use of place-related or nationality-related terms as personal names, imbuing an individual with a sense of identity connected to a larger heritage or simply a sound that resonates with the namer. It exists in proximity to names like Britain (which has modest usage as a given name), Brittany (originally a French region name, extremely popular in the 1980s–90s), and Bristol.
The additional 't' in Brittish distinguishes it visually from the common adjective while preserving its phonetic identity, a hallmark of American personalized spelling conventions. It is a name that invites questions and carries a certain audacity — chosen by parents who want something instantly recognizable in sound but utterly distinctive on paper, a name that announces its bearer as someone who charts their own course from the very first introduction.