 In 1951 Rosamund Hornby married Captain Douglas Eric "Deric" Holland-Martin (later Admiral Sir Deric Holland-Martin), a naval officer (10 April 1906-1977), fourth son of Robert Martin Holland-Martin.They had two children, Emma and Benjamin, who both work for the NSPCC.Lady Holland-Martin went twice to Valletta, Malta while her husband was Commander-in-Chief of Allied Forces in the Mediterranean.