'''Lyapunov''' ({{Langx|ru|Ляпунов}}, in old-Russian often written Лепунов) is a Russian surname that is sometimes also romanized as '''Ljapunov''', '''Liapunov''' or '''Ljapunow'''. Notable people with the surname include:
* Alexey Lyapunov (1911–1973), Russian mathematician * Aleksandr Lyapunov (1857–1918), son of Mikhail (1820–1868), Russian mathematician and mechanician, after whom the following are named: ** Lyapunov dimension ** Lyapunov equation ** Lyapunov exponent ** Lyapunov function ** Lyapunov fractal ** Lyapunov stability ** Lyapunov's central limit theorem ** Lyapunov time ** Lyapunov vector ** Lyapunov (crater) * Boris Lyapunov (1862–1943), son of Mikhail (1820–1868), Russian expert in Slavic studies * Mikhail Lyapunov (1820–1868), Russian astronomer * Mikhail Nikolaevich Lyapunov (1848–1909), Russian military officer and lawyer * Prokopy Lyapunov (d. 1611), Russian statesman * Sergei Lyapunov (1859–1924), son of Mikhail (1820–1868), Russian composer * Zakhary Lyapunov (d. after 1612), Russian statesman, Prokopy Lyapunov's brother
==See also== *Lyapunov family, a Russian noble family, to which not all the above individuals necessarily belong
{{surname|Lyapunov}}
Category:Russian-language surnames