Chaim Mordechaj Rumkowski (February 27, 1877 – August 28, 1944) was the head of the Jewish Council of Elders in the Łódź Ghetto appointed by Nazi Germany during the German occupation of Poland. Rumkowski was, before the German invasion of Poland, an unsuccessful businessman, Zionist activist and orphanage director. On 1 October 1939, he was appointed by the German occupation authorities as president of the Lodz Ghetto, one of the largest Jewish ghettos in Poland.
https://en.wikipedia.org/wiki/Chaim_Rumkowski