Hi,
My hubby is known by his middle name ever since he was a baby . He has never been called by his first name, or used it - His first name is just there on his birth reg ( basically doing nothing).
My father's the same- known by his middle name since birth just like my hubby except for two different reasons. My father was called by his second name from birth because his father had the same name. My husband was called by his second name from birth because the parents preferred that name to the one they had given to him for a first name.
It wasn't their choice, but the choice of their parents, and not the dislike for the names by the child itself - They've just never been called by their first names - Their second names are their first names.
My grandfather ( paternal side), My great Uncle (paternal side) , My great grandmother ( maternal side) were all were known by their middle names from birth to name just a few from the top of my head from the many of my lot who used their middle names since birth.
My great uncle married and died under hs middle name, My great grandmother too - it was and is perfectly legal.
I would think it's a pretty common occurence in many families
Kind regards
