罗谢尔 transliterates the French name 'Rochelle' (also a female given name). The French port city La Rochelle on the Atlantic coast — famous from 'The Three Musketeers' siege scene — is more standardly written
拉罗谢尔 (Lā Luóxiè'ěr) in Chinese;
罗谢尔 alone refers to the name itself.
