Proto-Norse language
Proto-Sinaitic script
Proto-English
Proto-Indo-European mythology
Proto-Indo-European language
Proto-language
Proto-Indo-Aryan
Proto-World language
List of Proto Indo European deities
Proto-Indo-Europeans
Proto-Semitic language
Germanic languages
Proto-Algonquian language
Oncogene
Nostratic
Iapetus Ocean
Australoid (race)