Portrait of Margaret, Countess of Coningsby (d. 1761), half-length, in robes, a coronet on a table behind, in a feigned oval

The sitter was the daughter of Thomas, Earl of Coningsby and his second wife, Frances, daughter and co-heir of Richard, Earl of Ranelagh. Her father had followed King William III to Ireland and had fought at the Battle of the Boyne. On William III's departure from Ireland, Coningsby was appointed Lord Justice and elevated to the peerage as Baron Coningsby, of Cianbrassil, Co. Armagh. In 1693, he was sworn of the Privy Council in England and later, in the reign of Queen Anne, was made Vice-Treasurer and Paymaster of the Forces in Ireland. King George I elevated him to the peerage as Baron Coningsby, of Coningsby, Co. Lincoln, and he was created Earl of Coningsby in 1719.
In 1716, the sitter was created Viscountess Coningsby of Hampton Court, Herefordshire, and in 1729, succeeded her father as Countess Coningsby. She married Sir Michael Newton, but had only one son, who died in infancy. Her honours and those inherited from her father became extinct on her death in 1761.