Um, not to be a party pooper, but no. There are no towns or counties in CA named after Joaquin Murrietta. San Joaquin county and the city of San Joaquin are the spanish versions of St Joachim. Not saying I agree with naming something after a criminal, but you gotta get your facts straight.
There is a town, not to mention an ex-nuke plant named after the guy and many other local spots through out the state named after him. I really don’t care if you believe it or not.