[mananaysiempre]

South in French is sud, while noon is indeed midi. However, the two words are the same in Latin (meridies, lit. midday, as in p.m. = post meridiem, etc.), so probably in some of the other Romance languages they do match?

[rpigab]

Midi is also a word for south in French, colloquially.

https://en.wikipedia.org/wiki/Southern_France

[jgrahamc]

The south of France is known colloquially as "Le Midi".