Multiple names? Check their age on Intelius for clues about which one is correct.
Find someone? Always call to make sure! And, try to get their e-mail address!
No address? DON'T skip them! You might be one call away! Use Intelius to find a relative about the same age. It might be a spouse or sibling. If they're 20-30 years older, it might be a parent or aunt/uncle. Use AnyWho or White Pages to find their number and call them for help.