They were both on Miz's Survivor Series team and they had a friendly interaction with each other after Drew won the IC title at the 2009 TLC PPV, but beyond that, they've never worked together. It's just a mutual respect between heels thing that WWE will occasionally use whenever they need 2 guys to gang up on someone else in a match. They've never had an alliance per se. I don't remember where the Celtic Connection name came from, but if Striker ignore it. It's just another one of his 10 billion idiotic references.