MUDr. Otto Heller, also Ota, was born on 3 July 1895. He became a physician and married Johanna née Skallová (1901–1981). The couple had one daughter, Zuzana (born 1927). On 5 July 1943 he was deported with his wife and his daughter with transport De from Prague to Theresienstadt concentration camp. His transport number was 401 of 604. On 6 September 1943 he was deported, again with his wife and daughter Zuzana, with transport Dl to Auschwitz concentration camp. His transport number was 761 of 2484. He — as well as 2451 other Jews from this transport — was murdered by the Nazi regime.

His mother-in-law, Berta Skallová née Morgenstern, was brought to death by the Nazi regime on 11 May 1943 in Theresienstadt. His daughter Zuzana, married Holitscherová, survived several Nazi concentration camps including the Auschwitz-Birkenau Family Camp. She lived in Prague until her death in 2017. Otto’s wife also survived.

https://www.holocaust.cz/en/database-of-victims/victim/93130-ota-heller/