A white Scandinavian.
Origins form when imegrants came to Scandinavia and they started calling the white people potatoes.
Now white Scandinavians use the word proto on them self, a friend or a stereotypical Scandinavian.
White Scandinavians often get offended when people who are not white call them a protos.
White people often replace the word n**ga with proto when performing a rap lyric.
Thank you dude, you are the best Proto!