My horse was named Moses, nick name Monster Moe, when I started working with him I found out later that he had been called Dallas Star before that owner had changed his name. He was a true monster when I got him and when I bought him and changed his name back I felt like I had a whole different horse. I don't think it was a name change that did it but it was still interesting, I changed back to Dallas also because I didn't like the name Moses, it just didn't fit right.
BTW I love the name Touche'! I knew a pony named Touche' and he was so fun!