On 18 October 1874 Naumenko married Vira Mykolaivna Shulhina, an aunt of
Oleksander Shulhyn. At that time she graduated from the
Kyiv Institute of noble girls. About same time Naumenko became a member of the
Hromada secret society. Since 1875 he was its treasurer. In 1876 Naumenko joined a group of the society's members, who, following the publication of
Ems Ukaz, adopted a decision to move their activities abroad. Starting from the 1890s, he was a member of Kyiv Literacy Society. Since the 1900s Naumenko practically headed the Old Hromada and was a member of the Southwestern Department of
Russian Geographic Society that was created in 1873 on the initiative the organization's members. In 1906-10 he participated in the activities of
Prosvita. In 1902 Naumenko acquired the plot of land where
Taras Shevchenko was buried and put on himself the responsibility of keeping it in order. He also served as a member of a commission of the
Russian Academy of Sciences headed by
Aleksey Shakhmatov, and participated in a delegation which achieved the removal of government bans against the Ukrainian press. == Publicist ==