Rhys ap Gruffydd (1508–December 1531) was a powerful Welsh landowner who was accused of rebelling against King Henry VIII by plotting with James V of Scotland to become Prince of Wales.
The potential for conflict with Ferrers increased when both men were given the right to extend their number of retainers; this led to the emergence of competing armed gangs.
The factions continued to cause other disruptions over the coming months, leading to deaths in street fights and acts of piracy.
Rhys had added the title Fitz-Urien to his name, referring to Urien, the ancient Welsh ruler of Rheged, a person of mythical significance.
[3] Contemporary writer Ellis Gruffudd, however, argued that the arrogance of the Rhys family had caused their downfall, saying that "many men regarded his death as Divine retribution for the falsehoods of his ancestors, his grandfather, and great-grandfather, and for their oppressions and wrongs.
"[4] Historian Ralph Griffith asserts that "Rhys's execution...was an act of judicial murder based on charges devised to suit the prevailing political and dynastic situation".
Since it was linked to Henry's attempt to centralise power and break with the church of Rome, he argues that it "in retrospect made him [Rhys] one of the earliest martyrs of the English Reformation.
He had also been friendly with Katherine of Aragon and Cardinal Wolsey, so ridding himself of Rhys helped Henry to prepare the ground for the Reformation.