Violet Ida Eveline Herbert, Countess of Powis and suo jure 16th Baroness Darcy de Knayth (1 June 1865 – 29 April 1929) was a British peeress in her own right.

[1] Lady Powis was the youngest child of Sackville Lane-Fox, 12th Baron Conyers, and his wife, Mary Curteis.

In 1888, Lady Powis' father died and the baronies of Darcy de Knayth and Conyers fell into abeyance between his two daughters.

On the same date, the House of Lords also agreed that their father had held the Barony of Darcy de Knayth, which was granted to Lady Powis.

Over the next 18 years, she effectively recreated the gardens of Powis into the internationally renowned form that they have today.