King Henry VIII and his new wife (who wasn't recognized by the Catholic Church) Anne Boleyn
Henry VIII was the first monarch to separate England from the Pope and the Catholic Church. As such he was the first Supreme Governor of the C of E.
James II
The last Roman Catholic monarch in England.
King Henry VIII separated the Church in England from the control of the Pope, although he initially did not intend to start an entirely separate Protestant faith. By the time of Queen Elizabeth, the split was permanent and the Church of England was a reality.
king Henry viii of England
It was: Henry the VIII
They feared the influence of a Catholic monarch
King Henry VIII, he was also the first protestant Monarch in the UK as it was during his reign that England became protestant.
A monarch of England is a king or queen of England.
Parliament might oppose a Catholic monarch due to historical conflicts between Protestantism and Catholicism, particularly in England, where the monarchy played a crucial role in the establishment of the Church of England. A Catholic monarch could potentially align the monarchy with the Catholic Church, undermining the established Protestant church and threatening the religious and political stability that had been hard-won after centuries of conflict. Additionally, there were fears that a Catholic ruler might prioritize the interests of Catholic nations, which could compromise national sovereignty and security.
The Reformation Parliament was important because it enacted laws that led to the break from the authority of the Pope and the Roman Catholic Church in England. It passed legislation that established the Church of England as a separate entity with the monarch as its head, marking a significant shift in religious power and authority.
As King or Queen of Britain and therefore the royal Monarch of the Anglican Church of England then I would hazard a guess that a Catholic would not meet the requirements.