I've always gone with a varying theme on Monkofdoom, so far I've had characters under the names of :

Monkofdoom <-- Normally a hunter
Monkofboom <-- Normally a mage
Monkofzoom <-- Normally a rogue
Monkofsoom <-- varies
Monkofloom <-- Normally a druid
Monkoftoom <-- Normally a warlock

I have around 25 characters using these names + a few other characters so recently had to change my tatics for the Monk5

Mankovdoom
Menkovdoom
Minkovdoom
Monkovdoom
Munkovdoom

It works