[jghjghjgh]

On the other hand he hadn't commit anything in last decade and he would get credit for others work

On the other hand he's an author...

mixed feelings, I'd say

Autor: {name} Contributed in years: 2007-2009.

[Freak_NL]

That's the usual way of doing it. When a project grows and gains more contributions you can have the AUTHORS file have a list of former major contributors and project founders, current major contributors, and a note acknowledging the dozens of occasional and drive-by contributors (who get full credit for their patches in the revision logs).

His request is not unreasonable at all.

[hardlianotion]

I think the license says his name should not have been removed in the first place?

[artboomy]

"Original author" sounds more clear. I like how rpcs3 done it with "former authors" block at https://rpcs3.net/about