Kaiser Wilhelm was a Prussian. He was not a Saxon. Hitler was an Austrian. He was not a Saxon. Bismark was not a Saxon.
So what? Nor was Genghis Khan. They did not invade Britain and could not affect the ancestry of the Anglo-Saxons.
Yorkshire and Northumberland are in Britain. They were never Anglo-Saxon. Neither were Scotland, Ireland, Wales, Devon or Cornwall.
So what? How does that affect the ancestry of Anglo-Saxons?
Germany as a nation-state did not exist until very recently.
It still does not exist in Germany.
Parts of Saxony are now in Poland and the Czech Republic.
So what? How does that affect the ancestry of Anglo-Saxons?
All that may be true but irrelevant.
As usual, you were in hair-splitting mode purely for the sake of it - nevertheless quite interesting.
Why, then, did your list not include all the other European countries, or Mongolia?
So, the Germans do not have German ancestry either then.
What we call Germanic has been around somewhat longer, therefore the Anglo-Saxons in Britain clearly must have some Germanic ancestry; not to mention that the Angles and Saxons must have had ancestry from many of the other groups before they came to Britain.
I would ask if you were just being obtuse by writing German and not Germanic but that does not explain why you found it necessary to include some other countries.
You may as well have written that WASP excludes Catholics and Muslims.