Go back 500 squillion years, or however long it is now, to Ancient Egypt and the Pharaohs’ marriages.
Didn’t Cleopatra marry her younger brother, Ptolemy?
Fast forward to 2020.
Is it common knowledge that the British Royal Fam are related by blood (or so they say) to the Romanov AND Vlad the Impaler?
Now – that’s freaky as flip ;o)