Nikolay Belyaev served as treasurer of the newly-founded Alexandrinsky Community[2] of Sisters of Mercy, named after Empress Alexandra Feodorovna, under the Committee of Christian Relief of the Russian Red Cross Society.

[6] Nikolay Belyaev was one of the initiators of the creation of the railway, which was an alternative to the upper Volga river route.

Nikolay Belyaev was also a member of the jewelry trading house D.P.&M Frolov[8] and of the Moscow Automobile Society, organizing public car races and developing early traffic regulations.

As a liberal-minded member of the Constitutional Democratic Party, Nikolay Belyaev aimed to reform the Russian state as a candidate for the Moscow City Duma.

While some members of the family fought in the White Army and heavily engaged in anti-bolshevik activities (and subsequently fled the country), others stayed and suffered repressions, until finally adapting for the new regime.

[8][13] Nikolay Belyaev was married to Alexandra Alexandrovna Belyaeva (1865-1954),[11] who originated from the well-known Moscow merchant family Alexeev.

was married to the Consul general of the Russian Empire in Damascus, Secretary of the Imperial Orthodox Palestine Society Alexey Belyaev[15] (1859-1906).