Mary Constance Wyndham

The Right Honourable The Countess of Wemyss and March
The Wyndham Sisters by John Singer Sargent, 1899, Metropolitan Museum of Art
Personal details
Born	Mary Constance Wyndham (1862-08-03)3 August 1862 Belgrave Square, London, England
Died	30 April 1937(1937-04-30) (aged 74)
Spouse	Hugo Charteris, 11th Earl of Wemyss, 7th Earl of March ​ ​ (m. 1883)​
Children	7
Parent(s)	Percy Wyndham Madeline Campbell

Mary Constance Charteris, Countess of Wemyss and March (née Wyndham; 3 August 1862 – 29 April 1937), styled Lady Elcho from 1883 to 1914, was an English society hostess and an original member of The Souls, an exclusive social and intellectual group.