It doesn't hurt to try generalized www search engines. A couple of my favorites include:
If you strike out with those resources, you might check out some pay services:
I have never used any of the following resources and can`t speak for them:
Search Problems?
Finding women can be more problematic than finding men, as so many of them change their names after marriage.
Very common names like Smith, Brown, Root, etc may also yield an unwieldy number of hits.
Don`t forget that you can search for parents, siblings, classmates, coworkers, or other
folks who can help connect you to the friends you are looking for. Good luck!