Fritz Zwicky a mụrụ na Varna, Bulgaria, na a Swiss nna. Nna ya, Fridolin (b. 1868), bụ a ma ama na-emepụta si Bulgarian obodo na-eleba anya na nọrọ na obodo na Varna (1908<unk>1933). The Zwicky House na Varna e mere na wuru site Fridolin Zwicky. Fritz nne, Franziska Vrček (b. 1871), bụ onye agbụrụ Czech nke Austria-Hungarian Alaeze Ukwu. Fritz bụ ndị kasị okenye nke ezinụlọ Zwicky si ụmụ atọ: o nwere a nwanne aha ya bụ Rudolf na a nwanne, Leonie. Fritz nne nwụrụ na Varna na 1927, na nna ya nọgidere na-azụ ahịa ruo 1945, mgbe ọ laghachiri Switzerland. Nna ya, Leonie zụrụ a Bulgarian nwa nwanne si Varna na nọrọ na obodo na-eleba anya na na Varna na-eleba anya na ndụ.
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