From Great Britain
A rare demonymic name referring to a person from Great Britain. It is derived from the Middle English and Old French terms for the inhabitants of the British Isles, ultimately tracing back to the Celtic tribe known as the Britanni.
Less common today
British isn't in the latest US Top 1000. It last peaked at #6,096 in 2015.
US births per 5-year period, 1990βpresent (SSA data).