Ignacy
Ignacy may refer to:
- Ignacy Tadeusz Baranowski, Polish historian
- Piotr Ignacy Bieńkowski, Polish classical scholar and archaeologist, professor of Jagiellonian University
- Ignacy Bohusz, noble in the Polish-Lithuanian Commonwealth
- Ignacy Daszyński, Polish politician, journalist and Prime Minister of the Polish government created in Lublin in 1918
- Ignacy Domeyko, 19th-century geologist, mineralogist and educator
- Ignacy Działyński, Polish nobleman known for his participation in the Warsaw Uprising of 1794
- Ignacy Feliks Dobrzyński, Polish pianist and composer
- Ignacy Hryniewiecki, member of the People's Will and the assassin of Tsar Alexander II of Russia
- Ignacy Jeż, the Latin Rite Catholic Bishop Emeritus of Koszalin-Kołobrzeg, Poland
- Henryk Ignacy Kamieński, Polish brigadier general
- Ignacy Krasicki, Primate of Poland, playwright, journalist, encyclopedist and Poland's leading Enlightenment poet
- Józef Ignacy Kraszewski, Polish writer, historian and journalist
- Ignacy Kruszewski, Polish military leader
- Jakub Ignacy Łaszczyński, Polish regional administrator and President of Warsaw
- Ignacy Ledochowski I, Austrian as well as Polish General, a scion of the Ledóchowski family and Commander of the Fortress Modlin
- Aleksander Ignacy Lubomirski, Polish noble, financier and philanthropist
- Jerzy Ignacy Lubomirski, Polish nobleman
- Ignacy Łukasiewicz, Polish pharmacist and petroleum industry pioneer who in 1856 built the first oil refinery in the world
- Ignacy Ścibor Marchocki, Polish noble, famous in the first quarter of the nineteenth century
- Ignacy Jakub Massalski, Polish-Lithuanian nobleman
- Ignacy Mościcki, Polish chemist, politician, and President of Poland
- Ignacy Nagurczewski, Polish writer, translator, educator, and Jesuit
- Ignacy Oziewicz, Polish general in World War II, received the Cross of Valour four times
- Ignacy Jan Paderewski GBE, Polish pianist, composer, diplomat, politician, and the second Prime Minister of the Republic of Poland
- Ignacy Pieńkowski, Polish painter and pedagogue active primarily in Kraków
- Roman Ignacy Potocki, Polish nobleman, politician and writer
- Ignacy Prądzyński, Polish military commander and a general of the Polish Army
- Ignacy Sachs, Polish, naturalized French economist
- Ignacy Schwarzbart, prominent Polish Zionist
- Ignacy Szymański, Polish and American soldier
- Ignacy Tłoczyński, Polish tennis player
- Ignacy Tokarczuk, Polish prelate of the Roman Catholic Church
- Ignacy Witczak, GRU Illegal officer in the United States during World War II
- Stanisław Ignacy Witkiewicz, Polish playwright, novelist, painter, photographer and philosopher
- Adam Ignacy Zabellewicz, professor of philosophy at Warsaw University
- Ignacy Zaborowski, Polish mathematician and geodesist
- Ignacy Żagiell, physician, traveler and Polish-language writer
- Ignacy Wyssogota Zakrzewski, notable Polish nobleman and politician during the last years of the Polish-Lithuanian Commonwealth
