User blog comment:Imperium Guy/British-German Union/@comment-4612798-20120926120014

Henry VIII and Eleanor of Austria?

If she'd been in the country like her aunt Catherine of Aragon had been then maybe. If she managed to bear him a son (but OTL she only managed to have one daughter who survived into adulthood) then perhaps Henry would never had broke with Rome. But all of that doesn't really lead to a union of England and Germany (or even Austria for that matter - the Hapsburgs were hardly running out of heirs).

The best I can think of is that somehow Henry & Eleanor's child inherits some of his uncle (Emperor Charles V)'s realm when he divides it in 1555.