The name Bill Gross is fairly common, as both the first name and last name are also fairly common.
2 are both nationally known and also located in Southern California:
1. The bond trader formerly with PIMCO and now with the Janus Fund. His bio is here
2. Internet investor and entrepreneur and board member at Cal Tech, his bio is here.
Yet, only I have the domain name TheRealBillGross.Com so I must be the “real” Bill Gross