I believe this was called "FindFace" it became a mobile app and I remember reading this article about it at the time: https://www.theguardian.com/world/2016/apr/14/russian-photog...
There is a flip side to this in places like Russia. If you are at a party and want to talk to someone, you might want to lookup whether she is the wife/girlfriend of the local crime boss/politician/general first.