Sir Isidore Spielmann, CMG FSA (London 21 July 1854 – 10 May 1925) was a British civil engineer turned art connoisseur, impresario and exhibition organizer.
Isidore's nephews and nieces included the women's suffrage campaigner Eva Hubback.
and on the baronet's death in 1885, the Sebag surname was altered by royal licence, in fulfillment of the legacy, initiating the new branch of the family.
[7] The younger of the two sons, Harold Spielmann, was killed at Gallipoli in 1915, as a 23-year old Captain in 10th Bn., the Manchester Regiment.
[8] The eldest daughter, Dora Marian Spielmann married Laurie Magnus, heir to the Magnus baronetcy, but he narrowly predeceased his father and it was their sons who continued that line; two of the daughters married a distant cousin from the Sebag-Montefiores, further bonding 'the Cousinhood'.