Marquess of Abergavenny (pronounced Abergenny) in the County of Monmouth, is a title in the Peerage of the United Kingdom created on 14 January 1876, along with the title Earl of Lewes (pronounced "Lewis"), in the County of Sussex,[1] for the 5th Earl of Abergavenny, a member of the Nevill family.

23 April 1955), son of Lord Rupert Nevill and Lady Anne Camilla Evelyn Wallop.

Abergavenny in the Marquess's title derives from the market town in Wales in which this branch of the Nevill family inherited Abergavenny Castle, much of the family's ancestral lands and title of Baron Bergavenny by virtue of the marriage between the suo jure peeress Elizabeth de Beauchamp, Baroness Bergavenny, and Edward Neville in 1424.

[citation needed] Subsequent Nevill Barons Bergavenny have been raised to higher ranks within the peerage.

[4][5] The heraldic blazon for the coat of arms of the Marquesses of Abergavenny is: Gules, a saltire argent charged with a rose of the field (barbed and seeded proper).