Queen Mary I of England was nicknamed "Bloody Mary" due to her persecution of Protestants during her reign.
Mary I was the daughter of King Henry VIII and his first wife, Catherine of Aragon. She became Queen of England in 1553 and tried to restore Catholicism as the official religion of England, leading to the persecution and execution of many Protestants. This earned her the nickname "Bloody Mary." Mary's reign was also marked by her unsuccessful marriage to King Philip II of Spain and a failed attempt to invade France. She died in 1558 and was succeeded by her half-sister, Elizabeth I.