Proto-Germanic (often abbreviated PGmc.),  is the unattested, reconstructed  
proto-language  of all the Germanic languages , including
Kaynak: Proto-Germanic language A 
proto-language (alternatively known as a parent language, or common ancestor) in the tree model  of historical linguistics  is a
Kaynak: Proto-languageProto-Semitic is the hypothetical 
proto-language  ancestral to historical Semitic languages  of the Middle East .  Locations which have
Kaynak: Proto-Semitic language Proto-Dravidian is the 
proto-language  of the Dravidian languages .  It is thought to have differentiated into 
Proto-North Dravidian,
Kaynak: Proto-Dravidian language Proto-Indo-Iranian is the reconstructed  
proto-language  of the Indo-Iranian  branch of Indo-European .  the hypothetical 
Proto-Indo-Iranians
Kaynak: Proto-Indo-Iranian language Proto-Balto-Slavic is reconstructed  
proto-language  descending from 
Proto-Indo-European  (PIE) and out of which all later Balto-Slavic
Kaynak: Proto-Balto-Slavic language Proto-Algonquian (commonly abbreviated PA) is the name given to the 
proto-language  from which the various languages of the Algonquian
Kaynak: Proto-Algonquian language Proto-Iranian, is the reconstructed  
proto-language  of the Iranian languages  branch of Indo-European language  family, and as such, the
Kaynak: Proto-Iranian language