I called mine Tio, like the FF7 black chocobo that the NPC Joe rides. I used to hate that chocobo's guts in FF7 because I struggled to beat him in chocobo racing. So as some sort of a twisted revenge, I named my chocobo after him XD
P.S. Tio was the way the name was spelled in the English version I played back in 1998. It's now apparently spelled Teioh.