I tried to color-code mine with naming conventions.

Crim (Fisherman) - Red (Crimson)
Mei'lou (Pugilist) - Yellow (Mellow Yellow)
Thyst (Botanist) - Purple (Amethyst)
Emer (Miner) - Green (Emerald)

I really hope some retainer name change services come out. I'll keep the naming conventions, they just need to better adhere to their classes.