My first name is quite long and old fashioned so for the last 17 years I've been using a shortened version.
At work, everyone knows me and uses my shortened name (even clients) except for one colleague who refuses. She likes to use 'proper' names for people and refers to me by long name plus middle name as it 'sounds better'.
I've addressed this with her multiple times and with my manager as it royalty fucked up a negotiation with a client as they felt like they were being passed around.
All they say to me is "well it is your name so..."
I mean, yes, it is my name, a name I didn't choose. I ask to be called X instead. No one else has a problem!
My manager even suggested that I legally change my name. I certainly don't want to do that as it is a family name, it means so much to my parents and I quite like having a name and then a 'formal' name.
So AIBU to keep insisting they use the short version? I rarely answer to the long version as no one ever uses that.