Lilou... hmm. Well I really like
Lila (pronounce Lee-la), Lyla (lie-la), and
Lilo (lee-lo). I'm not really sure how you are pronouncing this. I am saying it as "Lee-loo"
Anyway, I prefer Lila/Lyla and even
Lilo. That's not to say I hate
Lilou, I just like the others better! I think it definitely works as a NN to
Louise!
Of the ones you listed,
Lilou Georgia is my favorite. It's Cute! And they sound great together.
Other ideas:
Lilou KateLilou SummerLilou MarenLilou ClaireLilou SiennaLilou GraceLilou ScarlettLilou CarolineLilou PaigeLilou MorganLilou RainLilou CamilleLilou MagnoliaLilou RaeLilou VioletLilou ErinLilou IvyLilou TessLilou MaeLilou Sage