Purey-Cust was born into a distinguished family as the son of the Honourable William Cust, younger son of Brownlow Cust, 1st Baron Brownlow.
Arthur Conan Doyle | King Arthur | Arthur Miller | Arthur C. Clarke | Arthur | Arthur Ransome | Port Arthur | Chester A. Arthur | Arthur Balfour | Arthur Sullivan | Arthur Rubinstein | Arthur Andersen | Sir Arthur Conan Doyle | Prince Arthur, Duke of Connaught and Strathearn | Arthur Wellesley | Arthur Godfrey | Arthur Fiedler | Arthur Schopenhauer | Arthur Honegger | Arthur Rimbaud | Arthur (TV series) | Arthur Machen | Arthur Askey | Arthur Symons | Arthur Streeton | Arthur Phillip | Arthur Lowe | Arthur Ashe | Sir Arthur Harris, 1st Baronet | Arthur Boyd |
Names in Forward Harbour were all in honour of the Lascelles family, particularly Florence and Cust Points, which honour Lady Florence Cust, daughter of the 3rd Earl of Harewood and wife of Lieutenant Colonel John F. Cust.
On 10 February she was married at Castle Ashby to John Hume Cust, viscount Alford, elder son of John Cust, first Earl Brownlow, and the heir to a portion of the large estates of Francis Egerton, third and last Duke of Bridgewater.