I have 3 horses named Zuma, Little Bit, and Buster. Zuma is a Appy so I call her happappyloosa, and Little Bit is called Biddie, and Buster is called Fuzzy, Cush, and Buster Bar
I call my mare 'Sas', because it's her last three initials. What's weird is that my nickname is also my initials.
My horses registered name is Halleleo, which is kind of strange, so she generally gets called Halle, but has other names like Halle-lujah, Miss Halle, etc.
My horse's name is UVM Ilona, but I call her Loneybaloney, and sometimes puddinpop because she is all black.
My horse has no registered name that we know of from previous owners. His name is just Jack-and that's all it needs to be.
I have 3 Horses all with Nick Names... First we have My "Velvet" Dreams, her barn name of course, Velvet, my name for her, Girly Girl or Velvetine, She is my special girl, we found each other, and she will be with me until the very end. Next we have My Mystical Illusion, my daughter's horse, we call him "Lu",the lady that had him before us, just called him "Son", we didn't like that, more fun to call him Lu Lu. Last but least SaHera Knights Luv, her barn name is Hera, but she is my little HeraBear. She's fuzzy and kind of looks like a panda bear to me ;)