[1] He was born in Iași, United Principalities of Moldavia and Wallachia on 1 March 1862 the son of Henry Adrian Churchill (1828–86), who was an archaeologist and British diplomat, and Marie Braniefska (?1839-1905).
[2] In 1908 he married Stella Myers who qualified as a doctor at Girton College, Cambridge and went on to become a writer and lecturer on health questions, and a strong supporter of the Save the Children Fund.
[3] They had a son, George (born 1910), and a daughter, Ruth (1912–88), an architect who studied church architecture in pre-war Romania and then travelled extensively in Ethiopia.
[1] He was a collector of Renaissance and Oriental manuscripts, and of jewels, bronzes, pictures and other antiques while in Persia and Italy.
IV of their Persian Catalogue of Manuscripts is almost entirely devoted to the 'Churchill Manuscripts'); collected art objects in Persia for the Victoria and Albert Museum under Gen. Sir R. M. Smith, RE, KCMG, and also researched the history of gold and silver work in Italy, especially the Two Sicilies.