I could only speak for myself, but it's easy for me:
As I went to school and started playing drums in our school band, I had a girlfriend who was actually a Dino Maniac. One day when we played at a school party, she watched us, and then, after several Scotch-Colas, she called me the Rhythmosaur. It was written on the Base of my good Tama-drums faster then I could prevent it.... Okay, I changed the drum head, but the name remained.
I think, even you had an idea why to choose "Jolie" - the french word for beautiful. Might be happened when you looked into a mirror...
He, he, he,
The Rhythmosaur.