Douglas-Home mụrụ na Mayfair, London, nke mbụ n'ime ụmụ asaa nke Lord Dunglass (nwa nwoke nke 12 nke Earl nke Home) na nwunye ya, Lady Lilian Lambton (nwa nwanyị nke 4 nke Earl nke Durham). Aha nwata nwoke ahụ bụ "Alec". Otu n'ime ụmụaka nke di na nwunye ahụ bụ onye edemede egwuregwu William Douglas-Home.Na 1918 12th Earl nke Home nwụrụ, Dunglass nọchiri ya na earldom, na aha nkwanye ùgwù gafere Alec Douglas-Home, onye a na-akpọ Lord Dunglass ruo 1951. Onye na-eto eto bụ Lord Dunglass gụrụ akwụkwọ na Ludgrove College, nke Eton Eton sochiri Cyril Connolly, onye mechara kọwaa ya dị ka Ajụjụ: Ebee ka a mụrụ Douglas-Home?
Mayfair, London