Here's the real meaning behind those names...
Shiro (WK)- A white dog in japanese folk stories owned by a old man and woman.
Yokozuna (DF) - A grand Champion sumo wrestler
Poseidon (FW) - The god of the seas in greek mythology
Ares (FW) - The god of war in greek mythology
Atlas (FW) -A titan who is supporting the heavens in greek mythology
~ Lim Ting Wei