Family members made their fortune controlling grain distribution in beginning in Odessa (then Russian Empire, now Ukraine) and later controlled large-scale oil resources across Crimea and the Caucasus. From 1856, members of the family established banking houses in Vienna, Paris, and Athens. By 1860, the family was the world’s largest grain exporter. The Austrian branch of the family were elevated to the nobility by the Habsburg emperor.
During the 19th century, the family possessed vast wealth, owning many castles, palaces, and estates in Europe. The family were known for their connoisseurship, intellectual interests, and their huge collections of art.
The family name is considered to be a variation of "Ephrati", a Jewish family name attested in various countries since the 14th Century and still current in present-day Israel, in this case transformed through the Ashkenazi pronunciation (Ephrati-Ephrassi-Ephrussi).
Notable members of the Ephrussi include:
- Béatrice de Rothschild-Ephrussi (1864-1934) - part of the Rothschild family
- Boris Ephrussi (1901-1979), influential French geneticist (his wife, Harriet Ephrussi-Taylor, 1918-1968, was also a geneticist and crystallographer)
- Charles Ephrussi (1849-1905), art historian, proprietor of the "Gazette des Beaux-Arts", an inspiration for Charles Swann in Marcel Proust's À la recherche du temps perdu
- Ignaz von Ephrussi (1829-1899), Austrian banker
- Jules Ephrussi (1846-1915), French banker
- Marie Juliette Ephrussi, Princesse de Faucigny-Lucinge, (born 1880) - Princess de Faucigny-Lucinge
- Maurice Ephrussi (1849-1916), French banker
- Michel Ephrussi (1845-1914), French banker
- Viktor von Ephrussi (1860-1945), Austrian banker
- Fanny Reinach
- Boris Ephrusi (1865, Kishinev - 1897, San Remo) — Russian economist and journalist, member of the Russkoye Bogatstvo monthly magazine, brother of Perla Ephrussi and Zinaida Michnik (Ephrussi).
- Perla Ephrussi (also Paula and Polina Ephrussi, 1876, Kishinev - 1942, Pyatigorsk) — Russian educational psychologist.
- Zinaida Michnik (Ephrussi) (1878, Kishinev - 1942, Pyatigorsk) — Soviet pediatric researcher.
- Yakov Ephrussi (Russian: Яков Исаакович Эфрусси, 1900, Odessa - 1996, St. Petersburg) — Soviet engineer, innovator in the field of television technology, nephew of Zinaida Ephrussi and Perla Ephrussi.
The Hare with Amber Eyes
- 'Hare' chronicles unheard of Jewish family, The Jewish Chronicle of Pittsburgh (6 September 2011)
- De Waal, Edmund (2010). The Hare with Amber Eyes. Chatto & Windus. ISBN 0-7011-8417-5.
- Dan Rottenberg, "Finding our fathers: a guidebook to Jewish genealogy", 1986 
- Grand fortunes: dynasties of wealth in France, (Algora Publishing, 1998), By Michel Pinçon, Monique Pinçon-Charlot, Andrea Lyn Secara, page 124