Fritz Zwicky an haife shi ne a Varna, Bulgaria, ga mahaifin Switzerland. Mahaifinsa, Fridolin (haifaffen 1868), ya kasance shahararren masana'antun masana'antu ne a cikin birnin Bulgaria kuma ya yi aiki a matsayin jakadan Norway a Varna (1908<unk>1933). Fridolin Zwicky House a Varna ya tsara kuma ya gina shi. Mahaifiyar Fritz, Franziska Vrček (haifaffen 1871), dan asalin Czech ne na Daular Austro-Hungary. Fritz shi ne mafi tsufa na 'ya'ya uku na iyalin Zwicky: yana da ɗan'uwa mai suna Rudolf da' yar'uwa, Leonie. Mahaifiyar Fritz ta mutu a Varna a 1927, kuma mahaifinsa ya kasance a cikin kasuwanci har zuwa 1945, lokacin da ya koma Switzerland.
Astronomy a Caltech