Thomas Charles Colyear, 4th Earl of Portmore (27 March 1772 – 18 January 1835), styled Viscount Milsington from 1785 until 1823, was a British landowner and politician.
Lord Portmore was the son of William Colyear, 3rd Earl of Portmore and Lady Mary Leslie (1753–1799),[1] second daughter of the 10th Earl of Rothes.
Lord Milsington was an English amateur cricketer who made three known appearances in first-class cricket matches from 1792 to 1793. He was mainly associated with Hampshire and was an early member of Marylebone Cricket Club.[2]
Lord Portmore was a Member of Parliament (MP) for the borough of Boston in Lincolnshire from 1796 to 1802.[3]
He was married twice; in 1793 he married Lady Mary Elizabeth Bertie (d. 1797), daughter of Brownlow Bertie, 5th Duke of Ancaster and Kesteven, by whom he had a son:
In 1828 Lord Portmore married Frances Murrells.[4]
His titles became extinct on his death on 18 January 1835. The estates passed to his cousin James Dawkins (1760–1843), who had also been an MP.[5]
| Crest: | A Unicorn rampant Argent armed and maned Or |
| Coronet: | A Coronet of an Earl |
| Escutcheon: | Gules on a Chevron between three Wolves' Heads erased Or as many Oak Trees eradicated proper fructed Or |
| Supporters: | On either side a Wolf proper |
| Motto: | Avance |