|Born||May 5, 1878|
|Died||August 16, 1931|
|Occupation||American journalist, author|
Albert's father, Nicholas Sonnichsen had fought with the Confederate Army during the American Civil War and, like his son later, was captured and held as a POW. As young boy Albert ran from home and traveled around the world. In 1898 he went to the Philippines as American soldier during the Spanish–American War. He was captured and held in captivity for more than ten months. In 1905 he traveled to the Balkans. During 1906, he arrived in the Ottoman Empire. Sonnichsen joined the IMRO Bulgarian revolutionaries at their struggle against the Greeks and the Turks.
Sonnichsen married Natalie de Bogory (1887–1939), who is primarily known for her work in translating from the Russian language into the English language, and subsequently distributing and participating in having published the first or second American edition in the United States of the document known as the Protocols of the Elders of Zion. They had one child Eric in 1909, but were divorced in 1919.
- Who's Who. 1919.
- Spence, Richard (June 1, 2012). "The Tsar's other lieutenant: the antisemitic activities of Boris L'vovich Brasol, 1910-1960 Part I: Beilis, the protocols, and Henry Ford". Journal for the Study of Antisemitism: 204.
- The New York Public Library, Albert Sonnichsen papers, 1874-1944.
- Ten months a captive among Filipinos (1901)
- Deep Sea Vagabonds (1903)
- The Secret Republic of Macedonia. (1904).
- Confessions of a Macedonian Bandit. (1909).
- Consumers' Cooperation (1919)