After the death of his father, Mikhail Lyapunov, when he was about eight, Sergei, his mother, and his two brothers (one of them was Aleksandr Lyapunov, later a notable mathematician) went to live in the larger town of Nizhny Novgorod.
Aleksandr Solzhenitsyn | Aleksandr Aleksandrovich Stackelberg | Aleksandr Danilovich Menshikov | Aleksandr Usov | Lyapunov exponent | Lyapunov | Imperator Aleksandr II-class battleship | ''Imperator Aleksandr II''-class | Aleksandr Rodzyanko | Aleksandr Panayotov | Aleksandr Loktionov | Sergei Lyapunov | Lyapunov time | Lyapunov function | Aleksandr Viktorovich Zakharov | Aleksandr Vasilyev | Aleksandr's Price | Aleksandr Shavlokhov | Aleksandr Myasnikyan | Aleksandr Mikhailovich Orlov | Aleksandr Lyapunov | Aleksandr Ivanovich Laktionov | Aleksandr Derevyagin | Aleksandr Burago | Aleksandr Baranov | Russian battleship Imperator Aleksandr III | Russian battleship ''Imperator Aleksandr III''' | Battleship ''Russian battleship Imperator Aleksandr III | Aleksandr Zakharov | Aleksandr Yuryevich Gushchin |
The two mothers were first cousins of Aleksandr Mikhailovich Lyapunov, a notable mathematician who did pioneering work in stability theory, Sergei Mikhailovich Lyapunov, a composer, and Boris Mikhailovich Lyapunov, who is well known in Russia as an expert in Slavic languages.