Jette (Jettchen) Grünbaum was born in Adelsberg near Gemünden on October 3, 1889 as the youngest daughter of the shoemaker David Grünbaum and his wife Karolina, née Oppenheimer. She grew up in a family rich in children together with eight siblings.

She lived and worked in Bad Kissingen from 1930 till 1937. Her older sister Ernestine had already moved to the Franconian spa town in 1927 and had found an employment as a cook in the newly opened Jewish Spa Sanatorium on Altenberg. Jette worked there as an assistant cook. After the end of the spa season, the sisters lived in their home community of Adelsberg in the winter months, later in Wiesenfeld nearby (a suburb of Karlstadt). In October 1937, they eventually checked out for Wiesenfeld as the spa sanatorium didn’t get another concession for 1938 and they thus lost their jobs. Jette found an employment as a cook in Frankfort/Main for a short time but returned to Wiesenfeld already in July 1938.

In April 1939, both of them succeeded in fleeing to the United States where their older sister Hannah had already emigrated before the turn of the century. They lived in New York. Their siblings Betti, m. Zucker, Max, Gammi Camilla, m. Bamberger, could also emigrate to the USA. On the contrary, Fanny, m. Fränkel and Bertha, m. Berney, and Melie, m. Bickel, were deported and murdered.

After her emigration, Jette called herself Yettchen Greenbaum. According to Genicom data base, she died in November 1987 and was 98 years old at that time.