How to look up a name on facebook and match to town?

[Tech]

I have this ex gf that I have not made contact with for 4 years, I dont have her number anymore.I know where she lives and I know her first name, I want to get back with her, before I go knocking on her door is there anyway I can try to find her on facebook, like I said I know her first name only and the town shes lives in. Anyway to narrow a search down to a town? What social networks will this work on so I can search. Any ideas

[unknown]

Go to the search bar on top and type anything. Afterwards, you will see "search filters" on the left. Press "people"
Later, you will see "search tools", you can press location and add a filter, then add another filter for the name.