It sounds French in origin to me. Yet when I tried to look it up on baby names sites, it doesn't turn up anywhere. Is it a real name or is it just made up by the author of CG?
If Lelouch means, clever, crafty, and shady, it suits him really well. Though he has a good heart, I can't help but notice that Lulu's a little arrogant and sometimes over confident as well. ; ) But what about the origins of other characters' names such as Nunnally, Kallen, and Rolo? I've never heard of them anywhere else as well...