I realized yesterday that Joe Diamond's name is play much like Monterery Jack (well iot not a name of cheese, but still).
Joe's a Harboiled detective. His first name is pretty common, like Sam. His last name card suite (Diamonds) much like Spade. So his name is play on Sam Spade, Hammett's PI from The Maltese Falcon.
I feel dumn for not noticing it before. 
