Hi,
I use to acesses internet through my unkles router who stay at ground floor and I am on first floor. I set wpa security whith wifi. I know password but forgot user name. I don't want to tell unkle to rest his router. Is there any way to recover user name? Help

What do you mean by username ?
Are you trying to access the router or simply connect ?
If it's just connection, then open your wireless connection and search for the correct SSID (router's wireless name)

Try admin or administrator