Happens every day in South
Africa: we've even had a (male) Springbok rugby captain named
Jean de Villiers. Towards the end of the 17th century,
France revoked the Edict of Nantes which has guaranteed Protestants freedom of worship, so many of them chose to leave the country. South
Africa at that time was governed by the
Dutch East
India Company - it was a useful half-way station between
Europe and the East - and the Huguenots were, apart from being Protestant like the Netherlands, mostly skilled, hard-working people and welcome settlers. They naturally became assimilated into the Dutch-speaking population, founded the wine industry and continued to use French given names while speaking the
Dutch which was even then becoming Afrikaans.
Present-day South AFricans pronounce
Jean (m) as Zhahn, more or less.
Jean-Pierre is also often used, and often shortened to JP.