I was thinking: When was the last-time two royals married each other? I'm not well-versed on this, but in recent years, have any decided to wed? What made me think about this is Princess Charlotte of Cambridge. Should Princess Madeleine of Sweden have a boy next month,it would be a possibility. Not in the sense that It would be arranged, but what if they legitimately loved each other? Charlotte would take on her husband's titles, so she would be a princess of both Sweden and the UK, right?