Question: Who was the father of the King of England under whom William Thomas was a clerk of the Privy Council?

Context paragraphs:
President of the Queen's Privy Council for Canada: In the Canadian cabinet, the President of The Queen's Privy Council for Canada (French: "President du Conseil privé de la Reine pour le Canada" ) is nominally in charge of the Privy Council Office.  The President of the Privy Council also has the largely ceremonial duty of presiding over meetings of the Queen's Privy Council for Canada, a body which only convenes in full for affairs of state such as the accession of a new Sovereign or the marriage of the Prince of Wales or heir presumptive to the Throne (see Monarchy in Canada).  Accordingly, the last time the President of the Privy Council had to preside over a meeting of the Privy Council was in 1981 on the occasion of Charles, Prince of Wales' engagement to Lady Diana Spencer.  It is the equivalent of the office of Lord President of the Council in the United Kingdom.

Privy Council Office (United Kingdom): The Privy Council Office (PCO) provides secretariat and administrative support to the Lord President of the Council in his or her capacity of president of Her Majesty's Most Honourable Privy Council.  The head of the office is the Clerk of the Privy Council.  The PCO is an independent unit based in the Cabinet Office.

Clerk of the Privy Council (Canada): The Clerk of the Privy Council (French: "Greffier du Conseil privé" ) is the senior civil servant in the Canadian government.  The Title and Office is in fact "Clerk of the Privy Council and the Secretary to the Cabinet".  The Clerk is appointed by the Queen's representative in Canada, the Governor General, on the advice of the Prime Minister.

Historical lists of Privy Counsellors: These are lists of Privy Counsellors of England, Great Britain and the United Kingdom from the reorganisation in 1679 of His Majesty's Most Honourable Privy Council to the present day.  Members of the Privy Council of Ireland between 1660 and 1922 and of the Privy Council of Northern Ireland are also listed.

Edward VI of England: Edward VI (12 October 1537 – 6 July 1553) was King of England and Ireland from 28 January 1547 until his death.  He was crowned on 20 February at the age of nine.  The son of Henry VIII and Jane Seymour, Edward was England's first monarch to be raised as a Protestant.  During his reign, the realm was governed by a Regency Council because he never reached his majority.  The Council was first led by his uncle Edward Seymour, 1st Duke of Somerset (1547–1549), and then by John Dudley, 1st Earl of Warwick, from 1551 Duke of Northumberland.

Queen's Privy Council for Canada: The Queen's Privy Council for Canada (QPC) (French: "Conseil privé de la Reine pour le Canada" (CPR)), sometimes called "Her Majesty's Privy Council for Canada" or simply the Privy Council, is the full group of personal consultants to the monarch of Canada on state and constitutional affairs.  Responsible government, though, requires the sovereign or her viceroy, the Governor General of Canada, to almost always follow only that advice tendered by the Cabinet: a committee within the Privy Council composed usually of elected Members of Parliament.  Those summoned to the QPC are appointed for life by the governor general as directed by the Prime Minister of Canada, meaning that the group is composed predominantly of former cabinet ministers, with some others having been inducted as an honorary gesture.  Those in the council are accorded the use of an honorific style and post-nominal letters, as well as various signifiers of precedence.

Privy Council Office (Canada): The Privy Council Office (French: "Bureau du Conseil privé" ) is the secretariat of the federal cabinet of Canada, which is a committee of the Queen's Privy Council for Canada, and provides non-partisan advice and support to the Canadian ministry, as well as leadership, coordination, and support to the departments and agencies of government.  It is located in the Office of the Prime Minister and Privy Council (previously known as Langevin Block) on Parliament Hill.  The Federal Government helps the Privy Council by constituting the premier levels of government in Canada.

Michael Wernick: Michael Wernick (born September 1957) is a Canadian public servant and currently the Clerk of the Privy Council of Canada.  Wernick was previously the deputy minister for the Department of Indian Affairs and Northern Development from May 2006 to July 11, 2014.  Before being the clerk for the Privy Council office, Wernick was the deputy clerk under predecessor Janice Charette.  He has held several other positions in the Privy Council office and as Associate Deputy Minister for the Department of Canadian Heritage.

Privy Council of Thailand: The Privy Council of Thailand (Thai: คณะองคมนตรีไทย , "khana ongkhamontri thai") is a body of appointed advisors to the Monarch of Thailand.  The council, as the Constitution of Thailand stipulates, must be composed of no more than eighteen members.  The council is led by the president of the Privy Council of Thailand; currently former Prime Minister, "national statesman", and Army General Prem Tinsulanonda.  The king alone appoints all members of the council.  The council's offices are in the Privy Council Chambers, Phra Nakhon District, Bangkok.

William Thomas (scholar): William Thomas (died 18 May 1554), a Welshman from Llanigon, Brecknockshire, was a scholar of Italian and Italian history and a clerk of the Privy Council under Edward VI.  Thomas was executed for treason after the collapse of Wyatt's Rebellion under Mary I.

Supporting paragraphs: William Thomas (scholar) Edward VI of England
Answer: Henry VIII