[xeeeeeeeeeeenu]

It seems that AMD/ATI reuses the Radeon 8000 name approximately every 10 years:

2001: Radeon 8000 series

2013: Radeon HD 8000 series

2025: Radeon 8000S series

[_aavaa_]

Checks out. Increase number by 1,000 every year, modulo 10,000.