King of Ireland in the context of "George I of Great Britain"

The Kingdom of Great Britain, officially Great Britain, was a sovereign state in Western Europe from 1707 to the end of 1800. The state was created by the 1706 Treaty of Union and ratified by the Acts of Union 1707, which united the Kingdom of England (including Wales) and the Kingdom of Scotland to form a single kingdom encompassing the whole island of Great Britain and its outlying islands, with the exception of the Isle of Man and the Channel Islands. The unitary state was governed by a single parliament at the Palace of Westminster, but the distinct legal systems—English law and Scots law—remained in use, as did distinct educational systems and religious institutions, namely the Church of England and the Church of Scotland remaining as the national churches of England and Scotland respectively.

The formerly separate kingdoms had been in personal union since the Union of the Crowns in 1603 when James VI of Scotland became King of England and King of Ireland. Since the reign of James, who had been the first to refer to himself as "king of Great Britain", a political union between the two mainland British kingdoms had been repeatedly attempted and aborted by both the Parliament of England and the Parliament of Scotland. Queen Anne (r. 1702–1714) did not produce a clear Protestant heir and endangered the line of succession, with the laws of succession differing in the two kingdoms and threatening a return to the throne of Scotland of the Roman Catholic House of Stuart, exiled in the Glorious Revolution of 1688.

Charles II (29 May 1630 – 6 February 1685) was King of Scotland from 1649 until 1651 and King of England, Scotland, and Ireland from the 1660 Restoration of the monarchy until his death in 1685.

Charles II was the eldest surviving child of Charles I of England, Scotland and Ireland and Henrietta Maria of France. After Charles I's execution at Whitehall on 30 January 1649, at the climax of the English Civil War, the Parliament of Scotland proclaimed Charles II king on 5 February 1649. However, England entered the period known as the English Interregnum or the English Commonwealth with a republican government eventually led by Oliver Cromwell. Cromwell defeated Charles II at the Battle of Worcester on 3 September 1651, and Charles fled to mainland Europe. Cromwell became Lord Protector of England, Scotland and Ireland. Charles spent the next nine years in exile in France, the Dutch Republic and the Spanish Netherlands. A political crisis after Cromwell's death in 1658 resulted in the restoration of the monarchy in 1660, and Charles was invited to return to Britain. On 29 May 1660, his 30th birthday, he was received in London to public acclaim.

James VI and I (James Charles Stuart; 19 June 1566 – 27 March 1625) was King of Scotland as James VI from 24 July 1567 and King of England and Ireland as James I from the union of the Scottish and English crowns on 24 March 1603 until his death in 1625. Though he long attempted to get both countries to adopt a closer political union, the kingdoms of Scotland and England remained sovereign states, with their own parliaments, judiciaries, and laws, ruled by James in personal union.

James was the son of Mary, Queen of Scots, and a great-great-grandson of Henry VII, King of England and Lord of Ireland, and thus a potential successor to all three thrones. He acceded to the Scottish throne at the age of thirteen months, after his mother was forced to abdicate. Although his mother was a Catholic, James was raised as a Protestant. Four regents governed during his minority, which ended officially in 1578, though he did not gain full control of his government until 1583. In 1589, he married Anne of Denmark. Three of their children survived to adulthood: Henry Frederick, Elizabeth, and Charles. In 1603, James succeeded his cousin Elizabeth I, the last Tudor monarch of England and Ireland, who died childless. He reigned in all three kingdoms for 22 years, a period known as the Jacobean era, until his death in 1625. After the Union of the Crowns, he based himself in England from 1603, returning to Scotland only once, in 1617, and styled himself "King of Great Britain and Ireland". He advocated for a single parliament for England and Scotland. In his reign, the Plantation of Ulster and English colonisation of the Americas began.

Edward VI (12 October 1537 – 6 July 1553) was King of England and Ireland from 28 January 1547 until his death in 1553. He was crowned on 20 February 1547 at the age of nine. The only surviving son of Henry VIII by his third wife, Jane Seymour, Edward was the first English monarch to be raised as a Protestant. During his reign, the realm was governed by a regency council because Edward never reached maturity. The council was first led by his uncle Edward Seymour, Duke of Somerset (1547–1549), and then by John Dudley, Duke of Northumberland (1550–1553).

Edward's reign was marked by many economic problems and social unrest that in 1549 erupted into riot and rebellion. An expensive war with Scotland, at first successful, ended with military withdrawal from Scotland and Boulogne-sur-Mer in exchange for peace. The transformation of the Church of England into a recognisably Protestant body also occurred under Edward, who took great interest in religious matters. His father, Henry VIII, had severed the link between the English Church and Rome but continued to uphold most Catholic doctrine and ceremony. During Edward's reign, Protestantism was established for the first time in England, with reforms that included the abolition of clerical celibacy and the Mass and the imposition of compulsory English in church services.

George III (George William Frederick; 4 June 1738 – 29 January 1820) was King of Great Britain and Ireland from 25 October 1760 until his death in 1820. The Acts of Union 1800 unified Great Britain and Ireland into the United Kingdom of Great Britain and Ireland, with George as its king. He was concurrently duke and prince-elector of Hanover in the Holy Roman Empire before becoming King of Hanover on 12 October 1814. He was the first monarch of the House of Hanover who was born in Great Britain, spoke English as his first language, and never visited Hanover.

George was born during the reign of his paternal grandfather, King George II, as the first son of Frederick, Prince of Wales, and Princess Augusta of Saxe-Gotha. Following his father's death in 1751, Prince George became heir apparent and Prince of Wales. He succeeded to the throne on George II's death in 1760. The following year, he married Princess Charlotte of Mecklenburg-Strelitz, with whom he had 15 children. George III's life and reign were marked by a series of military conflicts involving his kingdoms, much of the rest of Europe, and places farther afield in Africa, the Americas and Asia. Early in his reign, Great Britain defeated France in the Seven Years' War, becoming the dominant European power in North America and India. However, Britain lost 13 of its North American colonies in the American War of Independence. Further wars against revolutionary and Napoleonic France from 1793 concluded in the defeat of Napoleon at the Battle of Waterloo in 1815. In 1807, the transatlantic slave trade was banned from the British Empire.

Elizabeth Stuart (19 August 1596 – 13 February 1662) was Electress of the Palatinate and briefly Queen of Bohemia as the wife of Frederick V of the Palatinate. The couple's selection for the crown by the nobles of Bohemia was part of the political and religious turmoil that set off the Thirty Years' War. Since her husband's reign in Bohemia lasted over only one winter, she is called "The Winter Queen" (German: Die Winterkönigin, Czech: Zimní královna).

Princess Elizabeth was the only surviving daughter of James VI and I, King of Scotland, England, and Ireland, and his queen, Anne of Denmark; she was the elder sister of Charles I. Born in Scotland, she was named in honour of her father's cousin and predecessor on the English throne, Elizabeth I. During Elizabeth Stuart's childhood, unbeknownst to her, part of the failed Gunpowder Plot was a scheme to replace her father with her on the throne, and forcibly raise her as a Catholic.