Jacek is a Polish given name of Greek origin coming from Hyacinth, through the archaic form of Jacenty. Its closely related equivalents are: Jacinto (Spanish and Portuguese), Giacinto (Italian) and Jácint (Hungarian).
The name Hyacinth (Jacek, Jacinto, Giacinto, Jácint) might refer to:
Saint Hyacinth (Święty Jacek, Jacek Odrowąż), Dominican friar and saint
Jacek Bąk, footballer
Jacek Bednarek, racewalker
Jacek Bogucki, politician
Jacek Cichocki, politician
Jacek Dehnel, poet and writer
Jacek Dukaj, science fiction writer
Jacek Falfus, politician
Jacek Gmoch, footballer
Jacek Huchwajda, fencer
Jacek Jezierski, writer and businessmen
Jacek Jędruch, Polish-American nuclear engineer and historian
Jacek Kaczmarski, singer, songwriter, dissident
Jacek Karpiński, computer scientist and engineer
Jacek Komuda, historian
Jacek Kościelniak, politician
Jacek Krupa, politician
Jacek Krywult, politician
Jacek Krzynówek, footballer
Jacek Kuroń, historian, dissident
Jacek Kurski, politician
Jacek Lipiński, lawyer, mayor of Aleksandrów Łódzki
Jacek Łągwa, musician and actor
Jacek Majchrowski, mayor of Kraków
Jacek Malczewski, painter
Jacek Małachowski, szlachcic
Jacek Nibliecky, politician and former footballer
Jacek Pastusiński, triple jumper
Jacek Saryusz-Wolski, politician, diplomat
Jacek Wszoła, high jumper
Jacek Yerka, painter
