My dad's present friends called him "Bill" but to find out, all of his high school friends called him "Chi-Shi" (Chee-She).

When I was a kid I asked him why. He explained that he looked like a Chi-Shi bird, big barreled chest and skinny legs. The years pass by and his older brother, my uncle was visiting. Don't know why but I asked him why they called my dad "Chi-Shi". He laughed and then told us that one time during high school my dad's class was taking a test. One of the other kids wanted to look on my dad's test paper. My dad told him no, that he didn't want to get in trouble. The kid then told him that he was "Chicken Shit".

The name stuck and he was known from then on as...Chi Shi.

My real name is Erik. I was called Bo for the first 18 years of my life. No one in high school knew my real name wasn’t Bo.

Story goes when I was little I’d say Bobo all the time (before I could really talk). I guess my older sister started calling me that. Eventually even my parents did too and it got shortened to Bo.

My high school girlfriend was shocked when she came to visit me during fall break first semester and everyone was calling me Erik. It took my Mom a long time to actually call me Erik. To this day, some of my childhood friends’ parents still call me Bo even though I’m 41 and haven’t been Bo for a good while. “I just can’t call you Erik” kind of thing. It’s a cool throw back to old days though.

When I left for college, I didn’t want to keep “Bo.” I had no beef with the name, it was just a pain in the ass not having my real name being used. I was going to legally change my name to Bo, but apparently I was more interested in beer and girls in college and never got around to it...so now I’m Erik.

My wife's name is Lynda. When they were toddlers, her sister could not pronounce that, it always came out "Ditta." She was known as Ditta as long as she lived in that town.

Even now, when she goes back to visit, or for a high school reunion, she is remembered as Ditta.

My given name is John after my paternal grandfather. However, like the OPs brother, the name I have always been called by my parents, friends and family is “Chip” (I think from the show My Three Sons although I’m an only child ).

When I graduated college I started to go by my given name, but to this day everyone who knew me before then calls me Chip. It get kind of weird in mixed company with some saying John and others Chip.

My dad was called "Smokey" by his family, although not many of his contemporaries are still alive, so most people call him Al now. That sort of proves the point that people don't do this any more.

But two guys I went to college with were each named Clarence and both go by Joe.

My wife's uncle's name is Sterling. He's actually Sterling Jr, or Sterling II I guess. He name his son Sterling III. Everyone calls him Tre, for Sterling 3.

Funny, none of his friends know him as Tre. When he got married all of his friends referred to him as Sterling. I thought they were talking about his dad.

My grandfather's name was Richard Johnson. For some reason when he was young everyone called him Russ/Russell. It wasn't until he enlisted for WW II that he found out his name was really Richard per his birth certificate. He went by Dick after that. Friends referred to him as Dick, but all of his relatives called him Russ/Russell.

I have 2 boys, the youngest 7, I call him Sharkey.

This year there was a funny name at the NFL combine.

Williams was nicknamed "Greedy" by his aunt, who called him "Greedy-Deedee" after babysitting him as an infant. His mother later took out the Deedee, and Williams adopted the name. In 2015, he told USA Today "I love [the nickname]. They say it’s a great DB name. It helps to be greedy as a defensive back."

https://en.m.wikipedia.org/wiki/Greedy_Williams