Obviously, getting a randomly assigned call sign that happens to match your initials would be pretty rare. However, the FCC allows licensed holders who hold a General or above, to apply for a "vanity license" whereby a request is made for an unassigned or abandoned call sign on a first come, first serve basis. Abandoned call signs are those where the owner has either died or has not renewed their license for a period of 3 years following the expiration of the license. This is how I picked up my current call sign and I'm pretty sure that Joe Taylor got his this way.