Dear Stan,

According to my info, Nechama K. (aka Nislah) was the grand-daughter of Shaul Wahl K. via his son Meir Moshe K.She married a different Moshe HaCohen Katz,(1570-??) ben Peysakh Yehuda, who is not the one who was Dayan of Frankfurt. The Dayan Moshe HaCohen (1550-1620) ben Meir Ephraim married Keileh Bingen.

This is I believe the one you are looking for: https://www.geni.com/people/Nessale-Nissla-Katz/6000000001281846714

Good Researching,
Adam Cherson
NY, NY