Facebook. people you may know.?

[lloyd]

Hi all.
I have recently joined Facebook under a false name. Wrong I know. Nothing sinister in this though. Friends have had bad experiences on there and all I want to do is look up old friends and see how they have changed over the years. Not to contact anyone or poke them whatever all that is. But just to have a nosey lol.
To my horror,there is a list on there called 'People you may know'. There are several people on this list who I do know but haven't seen for years.
Now, bearing in mind,none of these people know the false name I've joined with or my phone number or are on my email contact list,how can FB possibly know that I may know them? I'm not very active on the web. I don't join other forums. The only possible clue I can give is the email address I joined FB with includes my real initials and surname. Does this mean these people have searched my real name? Thanks for reading.