According to Jaroslav Klenovsky's records of the Vyskov Jewish Cemetery, Katti Feldmann died on 11.05.1901 aged 65 years giving a birth year of around 1836. She is buried next to Leopold Feldmann d. 7.12.1917.
https://cemeteries.zob.cz/vyskov
She may have been a sister of Josef Berger (1939-1917) also buried in that cemetery, and I am trying to confirm that information. Any clues greatly appreciated!