On 28 June 1911 their third son, Malcolm "David" Wanklyn was born in Kolkata, India. He had two brothers Peter (b. 1907), Patrick (b. 1915), and two sisters, Nancy (b. 1917—died of meningitis on her first birthday) and Nancy (b. 1924). The Wanklyns quickly became wealthy and by the time of David's birth they were at the height of their material and social success. In 1911 they were invited to the Delhi Durbar, attended by King George V and Queen Mary.