According to the albeit late Roman writer Ammianus Marcellinus who lived in the mid- to late-4th century CE, the Gauls and Aquitanians were meticulously clean (Ammiani Marcellini, Historiae, Liber XV:XII:II):
” …tersi tamen pari diligentia cuncti et mundi, nec in tractibus illis maximeque apud Aquitanos poterit aliquis videri vel femina licet perquam pauper ut alibi frustis squalere pannorum.”
Translated into English:
“… they are all exceedingly careful of cleanliness and neatness, nor in all the country, and most especially in Aquitania, could any man or woman, however poor, be seen either dirty or ragged.”
This site won’t allow to post the links, but the citations can be found at Wikisource and The Latin Library online.