John Douglas Carnegie, 12th Earl of Northesk (16 February 1895 – 22 July 1975) inherited the earldom in 1963.
[1] His maternal grandparents were Arthur Johnstone-Douglas and Jane Maitland (née Stewart) Johnstone-Douglas and his paternal grandparents were Lt.-Col. George Carnegie, 9th Earl of Northesk, and the former Elizabeth Georgina Frances Elliot.
[2] He was educated at Gresham's School, Holt and King's College, Cambridge.
[2] Carnegie served in World War I between 1914 and 1918 (mentioned in despatches), Captain (temporary Major), 95th (Hants Yeomanry) Brigade, Royal Field Artillery (TA).
They had four children:[2] Lord Northesk died on 22 July 1975 and was succeeded by his second son, Robert.