Markus (Mordechai) Breuer

Descended from family of Moshe Breuer, R"H Mattersdorf

According to the Wikipedia article on his son Rabbi Shlomo Zalmam Breuer, He was buried in Pilisvörösvár.

Possibly from the family of Yitzchok Breuer

Hermann (Hersch) Breuer was also from Szanto, Slovakia, and is a descendant of the Mattersdorf Breuers. This is worth investigating if Hermann Hersch Breuer is related to Rabbi Mordechai Breuer