Amy was born at 5 Westbourne Crescent in Tyburnia, Paddington,[2] the daughter of stockbroker Percy Ricardo (1820–1892)[3] of Bramley Park, Guildford, Surrey,[4] and his wife, the former Matilda Mawdesley Hensley (1826–1880), herself the daughter of John Isaac Hensley of Holborn in Middlesex.

On 10 November 1868, Amy married Charles Gordon-Lennox, the future duke, who then went by his courtesy title Earl of March.

He was the eldest son of Charles Henry Gordon-Lennox, 6th Duke of Richmond and former Frances Harriett Greville.

[1] They had five children before her death in 1879: In August 1879, following a "lingering and painful illness" Lady March died at the family's Belgravia home at 3 Grosvenor Crescent.

In 1877, the countess compiled and published a catalogue of the artworks held at the family homes, Goodwood House and Gordon Castle.