I came accross this article .

https://en.wikipedia.org/wiki/Prince_Joachim_of_Prussia

I must admit I had never heard the story before.

If Germany had won WW1, as the irish independentist (?) republicans seem to expect, Britain would have been sort of surrounded by german states, Ireland on the West and the German Empire on South East.
Probably a puppet german commanded France on South.

So many "if's".

Joachim, in his new role, would not have fallen in depression and comit suicide as he did after WW1, when he lost all his titles and apanages and became a mere citizen.