Kammala wannan jumla: Janusz Korwin-Mikke an haife shi a
Warsaw da Jamus ta mamaye a ranar 27 ga Oktoba, 1942. Shi kaɗai ne ɗan Ryszard Mikke da Maria Rosochacka. Mahaifinsa shi ne shugaban sashen injiniya na Kamfanin Jirgin Sama na Jiha. Bayan mutuwar mahaifiyarsa a lokacin Warsaw Uprising a 1944, ya kasance a ƙarƙashin kulawar kakarsa kuma daga baya mahaifiyarsa. Babban kakan Janusz Korwin-Mikke shi ne Gustaw Izydor Mikke aka Mücke, ɗan Samuel Beniamin Mücke (wanda ya kasance mai shayarwa a Kielce) kuma jikan Samuel Mücke.