King Henry IX is a fictional character often referenced in discussions about British monarchy, as there has never been a king by that name in real history. The title is sometimes used in literature or alternate history scenarios to explore what might have happened if a ninth Henry had ruled England. In the context of the British royal lineage, the most notable monarchs named Henry are Henry VIII, known for his six marriages and the English Reformation, and Henry VII, the founder of the Tudor dynasty. The idea of a King Henry IX allows for creative storytelling and speculation about the future of the monarchy.