Born in Paris, in the Rue Laugier (in the
17th arrondissement), Maurice Arnold de Forest was reportedly the elder of the two sons of Edward Deforest/de Forest (1848–1882), an American circus performer, and his wife, the former Juliette Arnold (1860–1882). He had a younger brother, Raymond (1880–1912). The boys' parents died in 1882, while on a professional engagement in the Ottoman Empire, of typhoid. Sent to live in an orphanage, they were adopted on 16 June 1887 by the wealthy Baroness
Clara de Hirsch (
née Bischoffsheim), wife of banker and philanthropist Baron
Maurice de Hirsch, who resided partially near
Brno in
Moravia,
Austria-Hungary (now the
Czech Republic) and given the surname
de Forest-Bischoffsheim. Baron and Baroness de Hirsch had lost their only surviving child, Baron Lucien de Hirsch (1856–1887), to pneumonia earlier that year. Baron de Hirsch died in Hungary at the age of 64 in 1896. His widow Clara died three years later, on 1 April 1899. Maurice inherited his adoptive father's residence,
Veveří Castle near Brno. Maurice inherited from the Baroness 25,000,000 Francs, as well as her estates in Rosice-Veveří. Baron de Hirsch had bought the estates in
Rosice in 1881. Maurice de Forest-Bischoffsheim was educated at
Eton College and
Christ Church, Oxford. According to the
Court Circular, on 6 March 1899, "The Emperor of Austria has given the title of Baron De Forest to M. Arnold [De] Forest and to his brother M. Raymond De Forest, both the adopted sons of Baroness de Hirsch de Gereuth, widow of the late Baron de Hirsch." Both men inherited millions of dollars from Baroness de Hirsch upon her death. In the following year, he was
naturalised as a British citizen, and was authorised to bear the title
Baron de Forest by royal licence. He was commissioned into the
Militia as a second lieutenant in the
Prince of Wales's Own Norfolk Artillery (Eastern Division) on 25 August 1900. He resigned his commission on 20 June 1903, but this was later cancelled and he became second lieutenant in the
Staffordshire Imperial Yeomanry (Queen's Own Royal Regiment) on 4 July 1903. He resigned this commission on 5 May 1906, by which time he was also an honorary second lieutenant in the Army. De Forest converted from
Judaism to
Roman Catholicism.
Winston Churchill visited de Forest at his Lancashire home, Rosefield Hall, near
Southport. Churchill also spent much time on de Forest's yacht and stayed three times (in 1908 together with
his wife during their honeymoon journey) at de Forest's Eichhorn Castle. ==Marriages==