Humphrey Arundell, leader of the Prayer Book Rebellion, was hanged, drawn, and quartered at Tyburn Tree on January 27, 1550. As this website states,
Humphrey was born in 1512 or 1513. His uncle was Sir John Arundell of Lanherne, one of the richest and most powerful men in Cornwall. The Arundell family were also very faithful Catholics. Humphrey married Elizabeth Fulford and together they had three children. By 1537, both of Humphrey’s parents had died and he took over the family home at Helland, near Bodmin.
Although he had been a loyal military servant of the Crown, the imposition of Archbishop Cranmer's ENGLISH Book of Common Prayer was not acceptable to Arundell and many in Cornwall:
They preferred the Mass in Latin to the new service in English:
Arundell's army was defeated and he was eventually captured, brought to London, tried, sentenced, and executed as a traitor.
More about the Prayer Book Rebellion here. Humphrey's cousin, Thomas Arundell of Wardour Castle, would be executed a little more two years later because Edward VI's government did not trust the Arundell's of Cornwall, suspecting Thomas's older brother John on complicity with the Prayer Book Rebellion and general rejection of religious change. John survived to thrive during the reign of Mary I but Thomas did not: