Elizabeth Cary (d.1830) was the elder daughter, and with her sister co-heiress, of Lt. General the Hon. George Cary (d.1792) and his wife Isabella Ingram (d.1799) of Barrowby, Yorkshire. George Cary was the second son Lucius, 6th Viscount Falkland (1687-1730) and his wife Dorothy Molyneux. Elizabeth married, in 1767, the Hon. Sir Jeffrey Amherst (1717-1796) as his second wife. Amherst was one of the senior military figures of his age, serving as Commander-in-Chief of the British Army in North America from 1758-1764, and Governor of Virginia 1759-1768 . In 1776 he was created Baron Amherst of Holmesdale, and in 1796 he became Field Marshal. Lord and Lady Amherst had no children.

Catherine Cary (d.1782) was the younger sister of Elizabeth, Lady Amherst. In 1775 she married Sir John Russell, 8th Bt. of Chequers (d.1783) by whom she had two sons John (9th Bt.) and George (10th Bt.).