John Christopher Blackett-Ord (1918-1996) (1918–1996) Parents John Reginald Blackett-Ord Lena Mary Blackett-Ord Children John Hamilton Blackett-Ord Betsy J. Blackett-Ord Margaret A. Blackett-Ord Siblings Anne Dillingham Blackett-Ord Elizabeth M. Blackett-Ord James Blackett-Ord Partners Elizabeth Hamilton Mitchell Pamela Margaret Malim