Isidor Josef Treidel was born in Mayen, Germany on January 24, 1887. Treidel became a lawyer prior to the First World War, in which he served and was awarded the Iron Cross 2nd Class. Following World War I, he continued his work as an attorney.

After the Nazis’ rise to power, they enacted the Civil Service Law in April 1933, which stated that those who were not racially “Aryan” could no longer serve in the civil sphere. Due to his service in WWI, Treidel was able to continue his practice for some time.

In 1935, Treidel’s name appeared on the “Koblenz Jews List.” Published by the Nazis, the list was meant to warn people not to associate or do business with the Jews. Starting in October 1938, Treidel was no longer allowed to serve as a Rechtsanwalt (lawyer) but rather as a Konsulent (consultant).

The following research article, written by Professor Kevin Ostoyich, delves into more detail about Isidor Josef Treidel and his family.