Rodolphe d'Erlanger

Rodolphe François Baron d'Erlanger was the fourth son of German-French private banker Baron Frédéric Émile d'Erlanger and his American wife Marguerite Mathilde Slidell (1842–1927), daughter of businessman and politician John Slidell.

His third brother Baron Frédéric Alfred d'Erlanger (1868–1943) also became a banker, but acquired acclaim as a composer as well.

Their only son, Leo Frédéric Alfred Baron d'Erlanger (1898–1978), eventually became the head of the family-owned bank which however he sold to Philip Hill Higginson Ltd. and its chairing partner Kenneth Keith, later Baron Keith of Castleacre, in 1958.

The bank then became Philip Hill Higginson Erlanger Ltd., until a further fusion with M Samuel, then named Hill, Samuel & Co. His palace at Sidi Bou Said, in northern Tunisia, which he named Ennejma Ezzahra (sometimes spelled Nejma Ezzohara), was built between 1909 and 1921.

In the early 1930s and under the patronage of King Fuad I of Egypt, he was one of the persons who prepared the first Congress of Arabic Music, that took place in 1932 in Cairo.