She was d of Cdr Alexander Dacre LACY 1894-1969 and Katherine Margaret Anne 1902-69 d of Adm Sir William Edmund GOODENOUGH GCB MVO 1867-1945 (gs of Rev Edmund GOODENOUGH 1785-1945 who was also gt gf of Sir William Macnamara GOODENOUGH 1st Bt 1899-1951) and Hon Henrietta Margaret STANLEY 1874-1956 d of 4th Baron SHEFFIELD 1839-1925 and Mary Katharine 1849-1929 d of Sir Isaac Lowthian BELL 1st Bt 1816-1904 and Margaret PATTINSON d 1886. She m 1957 Ronald Frederick Stephen COOKSON, and had three sons.