Hmm. We were asked this in the past, and if I remember correctly my sibling set was:
Bernard,
Anne,
Francoise and
Georges. (I could sit around all day saying "zhorzh" and be serenely happy.) I still like the set, but I'm not sure if
Anne qualifies as "purely French."
Going with these, combos (do the French make combos? -- I learned in school that they only have fns) would be:
Bernard MaximeAnne Colombe Francoise GermaineGeorges Emeric
So many gorgeous names left out. Oh, the humanity!
Ah well, que sera sera. ;-)