The Church of Hungary

In the Christian taxonomy of Andalusada, there was an isolated entry called "the Church of Hungary." It's the replacement for the Church of England IRL, and it takes things a step further by claiming to be Orthodox and Catholic and Protestant at the same time.

Introducing Constantine II of Hungary

"King Constantine." You don't need to name him any more than that; everybody will know who he is, just as well as they'd recognize "Count Dracula." And for the same reasons.

The guy is hated across cultures.

Let's introduce him...