She was a daughter of Robert Crewe-Milnes, 1st Marquess of Crewe, by his marriage to Lady Peggy Primrose, one of the first seven women appointed as magistrates in 1919 following the passing of the Sex Disqualification (Removal) Act 1919.
[2] Her maternal grandparents were Hannah de Rothschild and Archibald Primrose, 5th Earl of Rosebery.
According to The Daily Telegraph, she was best known for resisting the attempts of her husband to evict her from the family home, Floors Castle.
[3] On her own death, this was inherited by her grandnephew Bamber Gascoigne, the grandson of her much older half-sister Lady Annabel Hungerford Crewe-Milnes.
[1] In her will, the Duchess also bequeathed her family's collection of over 7,500 books, including major and hitherto unknown works of English and French literature, to the library of Trinity College, Cambridge, where both her father and grandfather had studied.