Hi Aidan,

there is a extensive Tisch family tree on Geni (I have researched part of it). They were also from Demandice / Deménd.
https://www.geni.com/family-tree/index/6000000066618732904

The problem is that vital rec books from Sahy/Ipolysag rabbinate (covering also Demend records) are available starting from 1850 only, so you will not get beyond that point. Perhaps checking civil vital records 1895-1906 that are in the archive in Levice could get you some more information.

Peter Absolon
Kosice, Slovakia