Oh dear, for a moment I thought you meant you had a child named French. :b
Claude &
Georgette are both rather nice--I'm partial to
Georgette as it's my middle name (after my grandfather,
George).
Claude isn't as overtly French as
Georgette, to me at least, so you could get away with a non-French name, I think. But I wouldn't go too far one way or the other (like using
Jessica or
Siobhan wouldn't "fit", for instance).
Cleo - adorable, but too similar to
Claude, IMO, unfortunately
Primrose - Also adorable. Could work, but seems a little immature next to
Claude &
Georgette to me. Maybe as a mn?
Yvette - WAY too close to
Georgette. I'd go with
Cleo over
Yvette.
Theodore - Wonderful. Could definitely work.
Elliot - Slightly similar in sound to
Georgette, but could work.
Lance - Just an unattractive name to me, but it fits in the sibset fine, I think (not too plain or too out there, etc.).
Some ideas:
SimoneBeatriceEveEsmeeEstellaElodieAdeleEloise
EverettFrederic(k)
RaymondVincentSimonPhilipVanceDorianLucienRemy