Final answer:
Mary I, also known as Bloody Mary, was the first Tudor queen to rule England. She became known as 'Bloody Mary' due to her efforts to reverse the English Reformation initiated by her father, resulting in many executions.
Step-by-step explanation:
Mary I, also known as Bloody Mary, was the first Tudor to rule England. Her father, Henry VIII, was the one who established the Tudor dynasty, but she was the first to rule under the Tudor name after her half-brother Edward's death. During her reign, she was known for her attempts to reverse the English Reformation, which her father had introduced, resulting in her nickname 'Bloody Mary' due to the large number of Protestants executed under her rule.
Learn more about Mary I