Isaak Tachauer was born in Georgensgmünd on June 7, 1879 as the son of Bernhard Tachauer and his wife Marianne, née Schweizer. His father Bernhard came from Eisenstadt/ Burgenland and had immigrated to Germany. He had studied to become a rabbi in Hungary and took on the position as a Teacher, Prayer Leader and Shohet. He was married to Marianne Schweizer from Rödelsee; the couple had 12 children.

The merchant Isaak Tachauer moved from Krumbach to Bad Kissingen in August 1904 and married Regina Seelig, the daughter of the Kissingen Cultural Official Isaak Seelig and his wife Klara, née Friedmann in October 1904. In 1905, their first daughter Gisela was born, in 1907, Hilde and in 1909 their son Sally followed. In March 1919, Isaak was granted Kissingen citizens’ rights. Isaak Tachauer ran a grocery and delicatessen shop. The family first lived in Promenadestrasse 4, between 1906 and 1908 at Marktplatz 6, then again in Promenadestrasse 4. Since 1929, the family lived in Promenadestrasse 2 and also ran a spa board there.

At the end of the 1930s, Isaak Tachauer lived in Maxstrasse 10 with his wife before the two of them emigrated to London in June 1937 where their daughter Hilde had already fled a year before. Their son Sally also succeeded in escaping to England. Their daughter Gisela could flee from annihilation by Nazi tyranny, too. She first emigrated to England, but in March 1939, she went on board the “Ile de France” and emigrated to New York. In the US Naturalization Register is noted that Gisela Plaut, née Tachauer (in the meantime married to Max Plaut) was naturalized in New York at the end of 1944. She married a second time there and had the family name of Feuchtwanger afterwards.

Isaak Tachauer lived in England’s South East south of London with his wife. He died in Surrey in 1949, his wife died in Sussex in 1953.