Stach is one of numerous variants of an Old-Slavic first name Stanislav (event. Stanimír). Men named Stanislav were supposed to support and expand the glory of the family, Stanimír meant someone defending and protecting peace. Some more examples of derivatives of Stanislav - Stacha, Stacho, Stachoň, Stachovský, Stachura, Stan, Stanko, Stana, Stáňa, Stanček, Stančík, Standa, Standera, Stane, Staněk, Staněček, Stanek, Stanický, Staníček, Staniš, Staňkovský, Stavovský, Staňura, Staša, Stašek, Staško etc.