Well, the Kaiser of WWI fame was the Grandson on Queen Victoria, and her husband Prince Albert was German himself. And Edward VIII was a little too friendly with Hitler.
I had my DNA done to try to solve some of the mystery of my English ancestors-— It came back Western European/Germanic... The family tree says I’m descended, on my maternal grandfathers side, from the Duke of Kent; Victoria being a first cousin to my great, great, grandmother.
The DNA doesn’t prove anything, of course, but well worth the money.