WOW--so much discussion over Mick Jagger's given name! In p47's defense, she did say his family and close friends call him Mike. I don't know about the rest of you, but I don't know any of his family or close friends so I don't know what they may call him. But does make sense that if his given name is Michael that at one point he would be called Mike and surely still is by some. Just saying. JMO
But what Wiki says according to Mike's post looks as if she was correct in her statement. Even tho like Mike said, Wiki isn't always correct. Let's face it, none of us really know. No need to go on and on about it I believe. JMO again!
For the record, I have a friend who's 1 year old son is named Jagger after Mick.
And just throwing this out there about the "Mike" nickname, my brother who is named after my grandfather who's name was Martin Henry has always been called Mike by all of his friends and family, as was my grandfather.

Don't know how that got started!