Well,1. do you have an genealogy program on your computer? You may want to put these people there until you find some information. 2. post questions here on g2g to try to find some sort of sources. 3. Use an reasonable guess as to the birth date and location. If you have some sort of birth order you can make guesses. young mothers used to have a child about every two years older ones every 3 years. Younger fathers tend to be about 4 years older than their wives. I sometimes guess 25 years for a generation. None of these are exact but at least they're a starting point. Be sure to state somewhere on the profile when you make such a guess others know what you've done, and especially so that you'll know in the future.