Adno Leonid Markovich (1888) - public figure, participant in the revolutionary movement since 1905.

From 1906 to 1908, Leonid Adno was arrested multiple times but released for lack of evidence. In 1910, Leonid Adno was arrested again and sentenced to 4 years of hard labor with the sentence commuted to eternal exile in Siberia, in the Yenisei province. In 1911, Leonid Adno escaped from exile to the city of Harbin, in 1913 he moved to the Ussuri region to work on the construction of a railway. In 1914, he was convicted for agitation among workers, escaping from settlement, and living under a false passport; he was sentenced to 1 year in prison with a return to settlement in the Far North. In May 1917, Leonid Adno arrived in Petrograd, where he took an active part in the preparation and conduct of the October Revolution. Then he moved to Moscow, worked in the Supreme Council of the National Economy, and was then sent to the Southern Front as head of food supply for the 9th, then the 11th army. After demobilization, Leonid Adno worked as a representative of the People's Commissariat of Foreign Trade in Tiflis. In 1925, he went on a business trip to Italy, France, and Germany to organize the sale of Donetsk coal. In 1934, he graduated from the Moscow Power Engineering Institute. In 1937, Leonid Adno was arrested by the NKVD and sentenced to 5 years in labor camps. In 1954, he was rehabilitated and moved to Riga.