Every US President Is Part of One Bloodline - The distant grandfather to all US presidents (except Van Buren) is King John "Lackland" Plantagenet, the very same King John who was the antagonist in the Robin Hood story. (Wikipedia) and also my GGF
Magna Carta - The Magna Carta was signed 15 June 1215 between the barons of Medieval England and King John. 'Magna Carta' is Latin and means "Great Charter". The Magna Carta was one of the most important documents of Medieval England.