Morphed german word Ebersbach -> Boar stream. During centuries it morphed into Adršpach (Eber -> Adr + sbach -> špach) as it was easier for Czechs to pronounce.

Adršpašský is second case (nominativ) of Adršpach.

Teplický is second case of Teplice (Teplitz/Tauplitz) -> coming from czech "teplý" -> hot/warm. Teplice was expression used for hot/warm springs/streams (there are few spa cities called like that).

Adršpach and Teplice are towns between which there rocks are located -> therefore Adršpašskoteplické skály :)