Wilczynski is a Polish surname with about 17 thousand bearers. It derives either directly from wilk (wolf) or from toponyms with this stem. It is most popular in Ostrów Mazowiecka, Dębica, Kielce and various other regions of Poland. Famous people of this name include:
Ernest Julius Wilczynski (1876–1932), American mathematician
Jan Kazimierz Wilczyński (1806–1885), Polish medical doctor, collector and publisher
Józef Olszyna-Wilczyński (1890–1939), Polish general
Katerina Wilczynski (1894–1978), Polish artist
Konrad Wilczynski (1982), Austrian handball player
Tomasz Wilczyński (1903–1965), bishop of Warmia
Wojciech Wilczyński (1990), Polish footballer
