Katharine Margaret Alice Macmillan, Viscountess Macmillan of Ovenden (''née'' Ormsby-Gore; 4 January 1921 – 22 January 2017), was the daughter of the 4th Baron Harlech, granddaughter of the 4th Marquess of Salisbury, great-granddaughter of the 10th Marquess of Huntly and daughter-in-law of Prime Minister

Harold Macmillan Maurice Harold Macmillan, 1st Earl of Stockton (10 February 1894 – 29 December 1986), was a British statesman and Conservative Party (UK), Conservative politician who was Prime Minister of the United Kingdom from 1957 to 1963. Nickn ...

, 1st Earl of Stockton. On 22 August 1942, she married

Conservative Conservatism is a cultural, social, and political philosophy and ideology that seeks to promote and preserve traditional institutions, customs, and values. The central tenets of conservatism may vary in relation to the culture and civiliza ...

politician Maurice Macmillan, making her the daughter-in-law of fellow Conservative politician

, who would serve as prime minister from 1957 to 1963. They had five children together: * 1) Alexander Daniel Alan Macmillan, 2nd Earl of Stockton (born 1943) * 2) Joshua Edward Andrew Macmillan (1945–1965) * 3) Adam Julian Robert Macmillan (1948–2016) * 4) Rachel Mary Georgia Macmillan (1955–1987) * 5) David Maurice Benjamin Macmillan (born 1957) She was Vice-Chairman of the Conservative Party in 1968 and was created a

Dame Commander of the Order of the British Empire The Most Excellent Order of the British Empire is a British order of chivalry, rewarding valuable service in a wide range of useful activities. It comprises five classes of awards across both civil and military divisions, the most senior two o ...

(DBE) in 1974. She became Viscountess Macmillan of Ovenden in February 1984 when her

father-in-law A parent-in-law is a person who has a legal affinity (law), affinity with another by being the parent of the other's spouse. Many cultures and legal systems impose duties and responsibilities on persons connected by this relationship. A person i ...

, former

British prime minister The prime minister of the United Kingdom is the head of government of the United Kingdom. The prime minister advises the sovereign on the exercise of much of the royal prerogative, chairs the Cabinet, and selects its ministers. Modern pri ...

, accepted a peerage and was created

Earl of Stockton Earl of Stockton is a title in the Peerage of the United Kingdom. It was created on 24 February 1984 for Harold Macmillan, the former Conservative prime minister (from 1957 to 1963), less than three years before his death in 1986. At the same tim ...

. Her husband died the following month, so never inherited the earldom from his father. She died on 22 January 2017.MACMILLAN
/ref>

References

Macmillan of Ovendon, Katharine Macmillan, Viscountess Macmillan of Ovendon, Katharine Macmillan, Viscountess Macmillan of Ovenden, Katharine Macmillan, Viscountess Macmillan of Ovendon, Katharine Macmillan, Viscountess Macmillan of Ovenden, Katharine Macmillan, Viscountess Macmillan of Ovenden, Katharine Macmillan, Viscountess Katharine {{UK-noble-stub