Messed up file ownerships – Urgent help needed

I accidentally issued `chown root * -R` while I was at ‚/’. This caused a catastrophic problem on my server.
I have managed to fixed most of the file ownerships but there are still a few files that I don’t know their previous ownerships.
For example these are some of them:



I will be grateful if someone could tell me what user should they belong to?