I'm looking for an addon where you can type in a name for your friend or guild co-member.

Example:
I know someone who has using the nickname Awesome4 outside of WoW. But in WoW Awesome4 uses the strangest nicknames you can imagine. I want to put a label on his name "Awesome4". So whenever he comes online i see like "Awesome4 (charname) has come online" for example. Or when he chats with me I see "Awesome4 (charname): I am talking to you!".

Is there such addon that can do this? For friends and guild mates if possible.