The short answer is, I was named after two people.
I was going to be Diane. My Dad particularly liked that name, that was the only reason. Then very shortly after I was born, I made some face or other that reminded him of Mum's brother, who had died the year before. Frank was much loved and much missed, and that was all it took to change their minds about my name. I was then going to be Frances Diane, but my brother (then 8) reminded them that his middle name is my Dad's name, so he figured mine should be Mum's name. (I love my middle name because it is Mum's, but I do not like to be called by it. A friend in highschool insisted on doing so, so now it only appears on official documents, and very few people know what it is, unless they knew Mum.)