8.8 Guild Patron

A Guild Patron is a god who has been asked by a guild to watch over them
and, if they request, provide guidance to the guild. Further, a guild   
may need a Patron to protect them from the machinations of gods of      
different ideals. The formal choosing of the Guild Patron is the sole   
province of the guildmaster, though of course the wishes of the guild as
a whole shouldn't be ignored by the guildmaster.                        

HELP GUILDS or HELP <guildname> will show you who the patron for a Guild

See also: GODS