All of my beardies have been named based mainly between Character and theme.
In order of appearance:
Envy - just the sassiest bugger of anyone. The only of my first three to survive the poor treatment from the pet store.
Grief - was the runt of the store in my original trio, and was white/grey, so had a sad color scheme.
Grudge - Again, original trio member. I went back for him the next day because I couldn't forget the glare I received for putting him back in the store's cage.
Mercy - Bloodbank Dragon, and man does she think she is a princess. Everything seems to be at her Mercy (or else get the death glare), but over all a complete attention hog.
Malice - AKA 'Studmuffin' He is big, and always ready for public attention. He's the most person friendly to anyone so Malice is a bit ironic I suppose.
Frenzy - We took her in from BD.org because a clutchmate nommed her foot, but man is she s nutjob. She loves having a hammock in the center of her viv so she can climb a log, snuggle on her hammock (with blankie), and then pounce off at roaches scurrying below. Also, she thinks my girlfriend's nail polish is a roach, and tries to nom her fingers whenever possible.