Medňanský () is a surname of Slovak origin. It derives from the village Medné (now a part of Lednické Rovne) with the suffix "-ský" in the role of nobiliary particle ("of Medné"). The name was influenced by the local Western-Slovak dialect.Medňanský instead of standard Medniansky.

It may refer, among others, to the following people: Martin Medňanský (1840–1899), Slovak priest, writer and national activist László Mednyánszky (1852–1919), Hungarian painter Imrich Medňanský (1861–1923), Slovak Baron and nobleman

See also Lednické Rovne

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