How do i find someone with little info on them?

all i know is where he lived and how to pronunce his last name ( i dont know how to spell it) it was about 10 years since i last saw this person and i really wanna reunite with them if there still alive any ideas on how i would go about finding them for free all i can seem to find is pay sites and thay dont work and with the advent of cell phones most people thease days dont list them