When one of my husbands grandmothers died, we discovered her second son (Uncle),had been adopted!!!! He had no idea, neither did anyone else..
We still do not know. (I would hate not knowing the whys)
Also her correct birth date. She had said many times she liked to add a few years so others, would be able to tell her, "You look so young!"...
So when she was 40, she started, telling people she was 43.. Sometimes, she would add a lot of years and other times, just a few.
Her Drivers license had a date, her marriage license another, her insurances all had different dates.. So while we were all driving up to the cemetery, we were looking forward to seeing the date carved on it.. Yep.. a different date! We really got a giggle.