Find the creator of a particular Unix socket

I'm struggling to find out which process exactly created a Unix socket. I've read couple posts about it like using lsof -nl (which generally gets the pid of a process which listens to Unix socket), using netstat -tulpen which doesn't show the socket I'm searching for and etc. Basically what I want is that gnome-keyring process listens to some unix socket (/run/user/1000/keyring-.../ssh) but which process exactly created that socket? Is there any command that would help me to find which process exactly (I could use Unix socket name if that would be helpful) created a socket? thanks. **P.S** Should not that information be held somewhere in /proc/pid/...?