Count Hermann Alexander de Pourtalès (31 March 1847 – 28 November 1904) was a Swiss sailor who competed in the 1900 Summer Olympics.

[3] His sister, Isabelle Marguerite de Pourtales, was the wife of archaeologist Henri Édouard Naville, a prominent Egyptologist who found a statue of Ramesses II at Bubastis.

[6] The Pourtalès family were French Huguenots who settled in Neuchâtel following the revocation of the Edict of Nantes in 1685.

[7] Pourtalès was a captain of the Cuirassiers of the Guard, in the service of the King of Prussia Wilhelm I who later became the German Emperor.

[15][16] She was a daughter of Henry Isaac Barbey and Mary Lorillard Barbey and a granddaughter of Pierre Lorillard III[17][18] Her sister Eva was married to André Poupart, Baron de Neuflize (son of Baron Jean de Neuflize the older brother of the Countess of Bessborough).