Did France demand that Great Britain change its name to United Kingdom before entering the European Union?
No. It’s official name has been The United Kingdom of Great Britain and Northern Ireland since the Republic of Ireland broke away from the UK in 1920, and the ratification of the Government of Ireland Act of 1920, where the UK recognized the independent Irish Republic. Before then, it had been the United Kingdom of Great Britain since the Acts of Union of 1707, and the United Kingdom of Great Britain and Ireland since the Acts of Union of 1800. Brittany had ties with Britain during the High Middle Ages, when both territories were rules by the Angevin Kings of England. In the Breton Revolt of 1173, Bretons rebelled against the attempts of Henry II to annex Brittany to the possessions of the English Crown. Lead by Henry II’s sone Geoffrey II, the Bretons were successful, and established the independent Kingdom of Brittany. Brittany became part of the Kingdom of France in 1492, when Anne, Duchess of Brittany, the sole heir to kingdom of Brittany, married Louis XII of France.