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William Colyear, 3rd Earl of Portmore

1745 – 1823

Scottish earl

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About William Colyear, 3rd Earl of Portmore

Lived 1745 – 1823 (aged 77–78). William Colyear, 3rd Earl of Portmore was a British.

Portrait of Colyear by Joshua Reynolds when he was a boy, 1759.

William Charles Colyear, 3rd Earl of Portmore (1745 – 1823) was a British peer, styled Viscount Milsington until 1785.

Early life He was the second but only surviving son of Charles Colyear, 2nd Earl of Portmore, and his wife Juliana. He was styled Viscount Milsingtion in 1756 on the death of his brother David.

Milsington was educated at Eton and St John's College, Cambridge. In 1774, he unsuccessfully contested the constituency of Evesham as a Tory.

Career Like his father the earl, Viscount Milsington was a racehorse owner; he and his wife were regular racegoers. His grey mare, Tiffany, won the 50-pound weight-for-age race at Salisbury Races in 1780 and his horse Scarf ran in the 1781 Derby.

He succeeded as the 3rd Earl of Portmore on the death of his father in 1785.

Personal life On 5 November 1770, he married Mary Leslie (1753–99), second daughter of the 10th Earl of Rothes. Their children included:

Thomas Charles Colyear, 4th Earl of Portmore (1772–1835), who married Lady Mary Elizabeth Bertie and had one son; there were no children from his second marriage, to Frances Murrells. Hon William Colyear Hon Francis Colyear (1781–1787) Lieutenant Hon John David Colyear (died 1801) Lady Mary Colyear (1773–1800) Lady Julia Colyear (1774–1800) on the same day in 1800, were the subject of a poem by Mary Young Sewell.

He died in London in 1823 and was succeeded by his son Thomas Charles Colyear, 4th Earl of Portmore.

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Important facts

Born
1745
Birth century
Died
1823
Education
Eton College, St John's College
Also known as
William Colyear, William Charles Colyear, Viscount Milsington, Lord William Charles Colyear

People in William Colyear, 3rd Earl of Portmore's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped William Colyear, 3rd Earl of Portmore's

Frequently asked questions

Who was William Colyear, 3rd Earl of Portmore?

Scottish earl

When was William Colyear, 3rd Earl of Portmore born?

William Colyear, 3rd Earl of Portmore was born in 1745.

When did William Colyear, 3rd Earl of Portmore die?

William Colyear, 3rd Earl of Portmore died in 1823.

What nationality was William Colyear, 3rd Earl of Portmore?

William Colyear, 3rd Earl of Portmore was British.

Sources & further reading

· Wikipedia: William Colyear, 3rd Earl of Portmore

· Wikidata: Q7617480

· DBpedia: William Colyear, 3rd Earl of Portmore

Cite this page

APA: Biography.guide. (2026). William Colyear, 3rd Earl of Portmore. https://biography.guide/william-colyear-3rd-earl-of-portmore/

MLA: "William Colyear, 3rd Earl of Portmore." Biography.guide, https://biography.guide/william-colyear-3rd-earl-of-portmore/.

Chicago: "William Colyear, 3rd Earl of Portmore." Biography.guide. https://biography.guide/william-colyear-3rd-earl-of-portmore/.

Data last updated: 2026-10-01 · Spot an error? Report a correction.

Portrait: Wikimedia Commons · author & licence

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