Zhou, pejorative name given posthumously to the last king of the Shang dynasty, King Zhou of Shang 商紂王|商纣王[Shang1 Zhou4 Wang2] (the name refers to a crupper 紂|纣[zhou4], the piece of horse tack most likely to be soiled by the horse)
trad. 紂
Also written 紂【Zhòu】