My irl name is Connor, and one day this girl in elementary school who was in my class thought I was a girl (she was a new student) and called me Conni because I had longer than average hair for a boy, and it felt kinda dumb because I'm not female, but it was kind of funny and I stuck with it because it was my memory of that girl and it turns out that now she is my gf so thats why I use it, just a simple reference and memento-ish of childhood memories.
Btw it is not from that tv show character Conni, I never even heard of it until I searched up Conni and saw it.
oh yeah I forgot an important part as well so here goes, this kinda also adds up with the above paragraph which makes it a coincidence:
When I joined PS, I once went by the name Connoisseur X after watching a lot of Pokemon Black and White anime, and I used to joined this (now closed) infamous, random, and funny groupchat called the MemeDome. I had a lot of friends there and I liked to talk with people there and it was kinda like my PS home before I got interested in actual chat rooms. Then someday in Meme Dome someone started calling me Conni, randomly because they didn't want to say my full PS username, and then that made me remember the girl in my primary class (she wasn't my gf at this time) and I had a big sense of nostalgia but I kinda smiled because it was fun times and then I tried to make a new username that was light blue (fav color atm) and then came "FishyConni" which was light blue, and then when I kinda separated from Meme Dome and entered CafeLeWow I felt like FishyConni wasn't so mature so I changed to Connni, which was dark blue, and because Conni was taken at that time by some other inactive person.
After sometime I spent in Cafe Le Wow and then transitioned to the Pokemon Go room, I became a Room Driver and talked randomly with the other staff members in the skype chat, and then out of the blue Zarel hits me up saying, "hey you want the name Conni", and I reply yes and then boom, I had the new pink Conni username, and I used that for Smogon and PS ever since, and it's funny how that memories of my childhood and memories of the present forged this name, its a very sappy backstory for such a short name haha.