Find information about host/user by his public key?

Say, I was reviewing my log files and noticed that someone with certain public key tried to connect to my server and got access denied (because his public key is not in my authorized_keys file).

May I somehow gather more information about user/host with this associated public keys? For example, this key may be attached to Github profile and I can filter Github users by public keys and find the one that used to attempt to login into my server?