Well, that’s called an honor killing. For a start, This article defines that concept in detail (which I tell you to forewarn that I’m immune to sealioning about the definition), has tables of trends, and has credible sources at the bottom. Honor killings, also known as shame killings, have attracted the attention of the EU as a major issue to be solved as a consequence of their spread. I can’t find a lot of data related to France specifically, but I do know the French consider their country to have a Femicide problem in general, and it’s reasonable to expect that if the total number of women being murdered is on the rise, the raw number of honor killings is climbing even if the proportion remains fixed.