Betty Eckstein, née Frank, worked for several years as a kindergarten teacher at the Israelite children's sanatorium in Salinenstraße and lived in Bad Kissingen during the summer months.

She was born in June 1886 in Hassfurt as the eldest of twelve children of Jacob Frank, who came from Wonfurt/Hassberge, and his wife Regina, née Heilbronner.

The fact that Betty Frank applied for a job in Bad Kissingen was certainly also due to the fact that her sister Minna, who was ten years younger, had worked in the Israelite children's sanatorium two years previously and had obviously had good experiences. According to her nephew Ludwig Mühlfelder, who had spent a few holiday weeks at the Israelite Children's Sanatorium in 1935, she was even "head nurse" and "director" there (Ludwig Mühlfelder, Weil ich übriggeblieben bin, Konstanz 1995, p.33). Betty Frank moved to Bad Kissingen in May 1921 - still unmarried at the time - and worked as a kindergarten teacher in the children's sanatorium during the summer months.  She continued to work here for the next three years. In October 1924, she left the spa town for good, probably because she had met Ignaz Eckstein, a widower from Oberlauringen, whom she married in July 1925.

From his first marriage to Hilde, née Sachs, he brought three children into the marriage: Werner (1909 - 1987), Ellenrose (1915 - 1971) and Elfriede (1919 - 2018). Nothing is known about the following years. Betty and Ignaz Eckstein lived in Hamburg before their emigration and managed to emigrate to the United States shortly before the start of the war in July 1939. Ignaz's three children were also able to flee to the USA, meaning that the whole family survived the Nazi era. According to the 1940 census, Betty lived with her husband and his youngest daughter Elfriede (now called Freida) in the borough of Queens, New York.

Ignaz Eckstein died there in November 1948, Betty outlived her husband by more than three decades. She died in December 1980 in the Bronx, aged 94. She was buried in Cedar Park Cemetery in Paramus, Bergen County, New Jersey.