Prince John

Prince John (24 December 1166 – 1216) was a member of the House of Plantagenet, the younger brother of Richard the Lionheart.

He tried to claim his brother's throne, but failed and was sent into exile. He eventually died in 1216 AD, leaving his and Richard's nephew, Arthur, as the sole heir to the throne of England and the Angevin Empire.

Differences from our timeline
The removal of John's reign from history is one of the key differences between our timeline and that of Lord Darcy's universe; as Richard did die in our world, John became king and delivered what historians call one of the worst reigns in English history, leading to the fall of the Angevin Empire.

Interestingly, John died in the same year in both timelines.