i chose mine because i wanted it to start with exe so that people in mmos would just call me exe and i wanted it to sound vaguely feminine so i played with every collection of syllables i could imagine until something stuck. now this has been my primary username/character name/blog name/whatever on basically everything for like 20 years. lol
we iterated through every morpheme we could think of for the ending, evaluating it on how we liked the sound of it, on how many people were using it per cursor searches of social media (preferring fewer), on whether it was diminutive (preferring not), and then we came up with one that has a hidden meaning that people with the appropriate background sometimes recognize but that typically goes unnoticed although its connotations may have subconscious effect.
so we went with that one, because we're all about that sort of thing.
Song i liked. It helps that I still like it
I still name most things after music i like most of the time to at least get an idea of where to go from there :p