my system is to add "money" after the player's first initial. here are some examples:
chris harper = c-money
bryce brown = b-money
brod smith = b-money
chris harper = h-money
and so on.
I have a similar system involving the use of prohibition era adjectives and random body parts
Collin "Nifty Knees" Klein
Bryce "Spiffy Toes" Brown
and so on.