During the First World War, he served in the Cameron Highlanders, being promoted captain in 1915. He transferred to the Royal Army Flying Corps and was later a prisoner of war.[2] After the war, he joined the Diplomatic Service, and in 1920, was 3rd Secretary; 2nd Secretary in 1925, serving in the London Foreign Office, Athens and Rome.[3][4]
In 1953, he was created a baronet by the Queen, of Marchmont in the County of Berwick and Bardrochat in the County of Ayr.[1][6] Upon his death in 1962, his title passed to his eldest son, Sir James. Upon Sir James' death in 1971, his title passed to his brother and Sir John's second son, Sir Robert, as Sir James had three daughters, but no sons. The current holder of the title is his grandson, Sir John Roderick Hugh McEwen, 5th Baronet (born 1965).[7]
Personal life
In 1923, McEwen married Brigid Mary Lindley (d. 1971), daughter of Sir Francis Oswald Lindley (1872–1950), the British diplomat, and granddaughter of botanist and illustrator John Lindley, who in 1840 was instrumental in saving The Royal Botanic Gardens at Kew from destruction. The raised their family at Marchmont House on the east side of the small town of Greenlaw, Scotland.[8] Together they had seven children, including:[9]
Sir James Napier Finnie McEwen of Marchmont and Bardrochat, 2nd Bt. (1924–1971), who married Clare Rosemary Sandars (1934–2007)
Sir Robert Lindley McEwen of Marchmont and Bardrochat, 3rd Bt. (1926–1980), who married Brigid Cecilia Laver, daughter of James Laver and Veronica Turleigh
Quarterly 1st & 4th Or a lion rampant Azure gorged with a ducal crown Proper on a chief of the second three garbs of the field (McEwen) 2nd & 3rd Gules three headless cranes Argent (Finnie).