Bertha Löwenthal was the youngest of the three daughters of the Bad Kissingen cattle dealer Maier Löwenthal and his wife Clothilde, née Ehrmann from Darmstadt. She was born in Bad Kissingen on August 13, 1908. The family lived in Promenadestrasse 3.

Bertha Löwenthal later worked as a household help. In October 1936, she went to Karlsruhe for a year, returned in September 1937 to Bad Kissingen for some days to take her leave from her parents and emigrated to the United States. 

Her parents also managed to flee to the USA one year later, which accounts for the fact that – according to US Census of 1940 – Bertha Löwenthal, in the meantime married to Fritz Löwenthal, their just-born son Harry and her parents lived together in an apartment in New York. Her husband Fritz Löwenthal came from Poland and had been living in the United States since 1913.

Bertha’s sister Irene, m. Appel, who had already emigrated to the Netherlands in 1933 was deported from Westerbork to Auschwitz/ Oświęcim Concentration Camp and murdered after German troops had invaded the Netherlands.

Bertha Löwenthal died in New York in September 2008, shortly after her 100^th birthday. Her husband had already died in September 1974, also in New York.