[header] How to find an old girlfriend on facebook [title] Search for her name in the facebook search bar. [step] This works better if you knew her more recently. Even if her name is not common, several people with that name might come up, but you should be able to figure out which one is her through the profile picture. 
[substeps] Obviously, it's easier to find her by searching for her name if her name is rare. If she is sarah jones, you may have a much harder time.