I've known my younger brother Steve for all of his life, but until very recently, I didn't know his name. I'm not alone, our own mother didn't know his name either. In fact, Steve didn't know his own name.
It turns out Steve's middle name is not what we thought it was. For most of his life, he's been using the wrong middle name and we've been misinformed as to what actually appears on his birth certificate. The name we thought he had and the name he actually has aren't even similar.
Strange but true.