The Captain and Tenille, what a perfect name!
The Captain gets top billing and gets to wear the hat, but no one knows what his real name is, so Tenille gets most of the recognition.
If a singer says "I am one of the Pips", people know who he is.
If the Captain walks in, he has to be more specific. He can't just say "I'm the Captain" and get the recognition that Cher, Madonna or Lady Gaga get with a short name. He would have to say "I'm the Captain, of The Captain and Tenille."
I have always wondered if Fleetwood Mac was named for his favorite car or his favorite food.