It was created in 1332 for John Darcy (or D'Arcy) with remainder to his heirs general, allowing daughters to inherit.
[1] His son, also named Conyers Darcy, was granted the title of Earl of Holderness.
The two titles remained united until the death of the fourth earl, when the earldom became extinct, while the baronies were claimed by his daughter, Lady Amelia.
The abeyance for the Barony of Conyers was terminated in 1892 in favour of Lane-Fox's eldest daughter Marcia Pelham, Countess of Yarborough.
On 29 September 1903, the abeyance of the Barony of Darcy de Knayth was terminated in favour of Lane-Fox's younger daughter, Violet Herbert, Countess of Powis.