1st cousins actually. https://en.wikipedia.org/wiki/Nicholas_II_of_Russia#:~:text=Nicholas%2C%20his%20wife%20Alexandra%2C%20and%20German%20emperor%20Wilhelm%20I

1st cousins actually. https://en.wikipedia.org/wiki/Nicholas_II_of_Russia#:~:text=Nicholas%2C%20his%20wife%20Alexandra%2C%20and%20German%20emperor%20Wilhelm%20II%20were%20all%20first%20cousins%20of%20King%20George%20V%20of%20the%20United%20Kingdom https://en.wikipedia.org/wiki/Nicholas_II_of_Russia#:~:text=...