جاك لافيت
On 30 June 1858, Friedrich Emil Erlanger married a young Parisian socialite, Florence Louise Odette Lafitte (1840–1931). Her grandfather, Jacques Laffitte, was a banker, governor of the Bank of France, Finance Minister, and Prime Minister of France temporarily. In 1859, d'Erlanger officially took over the business of the banking house in Paris. He changed his name and was afterwards called Frédéric Émile Baron d'Erlanger. His marriage failed, however. The couple had no children and they divorced in December 1862.