German Sign Language family

The German Sign Language family is a language family of sign languages, including German Sign Language, Polish Sign Language and probably Israeli Sign Language.Wittmann, Henri (1991). "Classification linguistique des langues signées non vocalement." Revue québécoise de linguistique théorique et appliquée 10:1.215–88.

Anderson (1979) suggested that Swedish Sign, German Sign and British Sign share one origin in a "North-West European" sign language.