Musa I, Mansa of Mali, more commonly referred to simply as Mansa Musa, ascended to the throne of the wealthy Mali Empire in 1312.Not much was known about the emperors outside of Western Africa, but Musa's religious Hajj in 1324 would bring great attention to the wealth and extravagance of his lands.Alan Rufus Alan Rufus, also known as Alain le Roux or Alan the Red, gained materially by virtue of his proximity to William the Conqueror.
[Warning: non-historian arguing about history, which is always dangerous and sometimes awful.
Henry Duke of Lancaster Henry of Grosmont was English diplomat, noble, soldier, and founding member of the Order of the Garter.
He held multiple titles among which were 1st Duke of Lancaster, 4th Earl of Leicester and Lancaster as well as Earl of Derby, all of which probably contributed to a vast fortune which was worth approximately .5 billion as adjusted for inflation.
His fortune was estimated to be equivalent to £81.33 billion, or roughly US2.74 billion, in 2007, thus making him the wealthiest Briton in all the history of the British Isles. William I de Warrene Originally from Normandy, William I de Warenne was one of the very few proven Companions of William the Conqueror known to have fought at the Battle of Hastings in 1066.
For his loyalty and help in the battle, was rewarded with properties in Sussex, Northfolk and Yorkshire.