I just discovered Prince Guillaume yesterday when someone posted a guest list of who will be at the Monaco Royal Wedding, and since I'm only familiar with the Monaco Princely Family, the Swedish Royal Family, and some of the Belgium Royal Family, I decided to take it upon myself to find out the names listed.
However, I didn't get far because starting from the bottom of the list with the Luxembourg Royal Family, I stopped dead in my tracks and didn't get any farther than Prince Guillaume, lol.

Seriously, he's a fascinating individual from what I read on wikipedia, therefore having whetted my appetite I wanted more and came here late last night to read up about him for over 2 hours!
Anyhow, just wanted to say "Hi" and that my eyes will be looking for Prince Guillaume during the next few days in Monaco ~ salut!