Alphons was one of five children of Albert von Rothschild (1844-1911) and his wife Bettina (née Rothschild, 1858-1892). With the Anschluss of Austria by the Nazis, Alphons fled through Switzerland, Paris and Canada and eventually settled in the US. He was married to Clarice Adelaide Sebag-Montefiore (1894-1967) with whom he had three children. Alphons de Rothschild died in 1942.
Ferguson, Niall. The House of Rothschild: Money's Prophets, 1798-1848. New York, 1998
Ferguson, Niall. The House of Rothschild: The World's Banker, 1849-1999. New York, 1998
Lillie, Sophie. Was Einmal War: Handbuch der enteigneten Kunstsammlungen Wiens. Vienna, 2003: 1003-1110.