The current members of Marilyn Manson are as follows:

Marilyn Manson - Marilyn Monroe + Charles Manson
Twiggy Ramirez - Twiggy (60's Model) + Richard Ramirez (Serial Killer)
Madonna Wayne Gacy - Madonna + John Wayne Gacy (Serial Killer)
Ginger Fish - Ginger Rogers + Albert Fish (Cannibal Child-Killer)
ZimZum - Name of a Bible Character who did God's dirty work

and the following names are Former Members 

Daisy Berkowitz - Daisy Duke + David Berkowitz
Gidget Gein - Gidget (actress) + Ed Gein (Cannibal Psycho)
Sara Lee Lucas - Sara Lee (Baking Goods) + Henry Lee Lucas (Killer)