Did you grow up w anyone who went by their middle name but now goes by their first name?

I go by my first initial and middle name

Yes

Next question?

My son, started using his first name after my father died. Named after his grandfather

I grew up with someone who changed last names. His folks were only common law married for most of his childhood, and may still be. He used mom's last name when he was in school. He changed to his dad's a few years after we graduated.

I remember playing ball in middle school with a guy who I didn't go to school with who went by his middle name and that was the only name I knew him by.

We show up at the same high school together and I say, "Hey 'middle name'" and he looks at me like I'm nuts bows up and says, "What did you call me? I'm 'first name' now!" We didn't hang out much after that. I think he actually moved schools rather quickly.

Why would anyone go by their middle name?

If the parents wanted the kid to go by the middle name then why’d they put it in the middle? Just put the name you really want - first-