List of Irish monarchs in the context of "Philip II of Spain"

Mary I (18 February 1516 – 17 November 1558), also known as Mary Tudor, was Queen of England and Ireland from July 1553 and Queen of Spain as the wife of King Philip II from January 1556 until her death in 1558. She made vigorous attempts to reverse the English Reformation, which had begun during the reign of her father, King Henry VIII. Her attempt to restore to the Church the property confiscated in the previous two reigns was largely thwarted by Parliament but, during her five-year reign, more than 280 religious dissenters were burned at the stake in what became known as the Marian persecutions, leading later commentators to label her "Bloody Mary".

Mary was the only surviving child of Henry VIII by his first wife, Catherine of Aragon. She was declared illegitimate and barred from the line of succession following the annulment of her parents' marriage in 1533, but was restored via the Third Succession Act 1543. Her younger half-brother, Edward VI, succeeded their father in 1547 at the age of nine. When Edward became terminally ill in 1553, he attempted to remove Mary from the line of succession because he supposed, correctly, that she would reverse the Protestant reforms that had taken place during his reign. Upon his death, leading politicians proclaimed their Protestant cousin, Lady Jane Grey, as queen instead. Mary speedily assembled a force in East Anglia and deposed Jane.

Elizabeth I (7 September 1533 – 24 March 1603) was the Queen of England and Ireland from 17 November 1558 until her death. She was the last and longest reigning monarch of the House of Tudor. Her eventful reign, and its effect on history and culture, gave name to the Elizabethan era.

Elizabeth was the only surviving child of Henry VIII and his second wife, Anne Boleyn. When Elizabeth was two years old, her parents' marriage was annulled, her mother was executed, and Elizabeth was declared illegitimate. Henry restored her to the line of succession when she was 10. After Henry's death in 1547, Elizabeth's younger half-brother Edward VI ruled until his own death in 1553, bequeathing the crown to a Protestant cousin, Lady Jane Grey, and ignoring the claims of his two half-sisters, Mary and Elizabeth, despite statutes to the contrary. Edward's will was quickly set aside and the Catholic Mary became queen, deposing Jane. During Mary's reign, Elizabeth was imprisoned for nearly a year on suspicion of supporting Protestant rebels.

Anne (6 February 1665 – 1 August 1714) was Queen of England, Scotland, and Ireland from 8 March 1702, and Queen of Great Britain and Ireland following the ratification of the Acts of Union 1707 merging the kingdoms of England and Scotland, until her death in 1714.

Anne was born during the reign of her uncle King Charles II. Her father was Charles's younger brother and heir presumptive, James, whose suspected Roman Catholicism was unpopular in England. On Charles's instructions, Anne and her elder sister Mary were raised as Anglicans. Mary married her Dutch Protestant cousin, William III of Orange, in 1677, and Anne married Prince George of Denmark, a Lutheran, in 1683. On Charles's death in 1685, James succeeded to the throne, but three years later he was deposed in the Glorious Revolution of 1688. Mary and William became joint monarchs. Although the sisters had been close, disagreements over Anne's finances, status, and choice of acquaintances arose shortly after Mary's accession and they became estranged. William and Mary had no children. After Mary's death in 1694, William reigned alone until his own death in 1702, when Anne succeeded him.

The Act of Settlement (12 & 13 Will. 3. c. 2) is an act of the Parliament of England that settled the succession to the English and Irish crowns to only Protestants, which passed in 1701. More specifically, anyone who became a Roman Catholic, or who married one, became disqualified to inherit the throne. This deposed the remaining descendants of Charles I, other than his Protestant granddaughter Anne, as the next Protestant in line to the throne was Sophia of Hanover. Born into the House of Wittelsbach, she was a granddaughter of James VI and I from his most junior surviving line, with the crowns descending only to her non-Catholic heirs. Sophia died less than two months before Queen Anne, and Sophia's son succeeded to the throne as King George I, starting the Hanoverian dynasty in Great Britain and Ireland.

The Act of Supremacy 1558 (1 Eliz. 1. c. 1) had confirmed the independence of the Church of England from Roman Catholicism under the English monarch. One of the principal factors which contributed to the Glorious Revolution was the perceived assaults made on the Church of England by King James II, a Roman Catholic, who was deposed in favour of his Protestant daughter Mary II and her husband William III. The need for this Act of Settlement was prompted by the inability of William and Mary, as well as of Mary's Protestant sister (the future Queen Anne), to produce any surviving children, and by the perceived threat posed by the pretensions to the throne by remaining Roman Catholic members of the House of Stuart.