A generalized tool would be a search engine. You can type the persons name into the search engine and get results based on their name. This may or may not turn up search results depending on if their name has ever been in print, online, etc.

If you are looking to definitely pin point somebody your best bet would be to check out a “people locating” service. If you want to go about doing things this way you need to first find a service that works for you. The first step would be to type in “finding people” in your favorite search engine. This will return several services that will allow you to hunt down the person you are looking to find. Next, you will probably have to create an account with the service. This way they will have all of your information and will know where to deliver your results. You will then need to specify how you are going to pay for these services. Most companies accept credit card, which is usually the easiest way of doing things. Now to actually find somebody you need to provide the service with as many details that you can regarding the person. Thing includes personal details like name, date of birth, address, etc.

Remember that these services do not always work, but if you are in desperate need it is worth a shot. Do your research on each company before deciding on which one to use. It will save you time and money in the long run.