March 17/] 1911) was a Russian revolutionary, poet and member of Narodnaya Volya (People's Will Party) during the 1880s.

October 22] 1860 in landed property Isaevo, Valdaysky Uyezd, Novgorod Governorate, Russian Empire.

He spent three years in the Peter-Paul Fortress for participation in political movements and was subjected to penal servitude in Siberia from 1887 to 1899.

In 1899 he received permission to live in Kazan, and in 1903 - in Udelnaya [ru], Sankt-Peterburgsky Uyezd, Saint Petersburg Governorate.

According to an article on Leon Trotsky by David North (referring to Yakubovich's poems) "His poems, which evoked the heroism and tragedy of the doomed struggle of the revolutionary terrorists against tsarism, made a deep moral impact upon the youth of the 1890s.