Jon Snow is a fictional character in the fantasy novel song of ice and fire by the famous American fantasy writer George Martin (who has won Hugo, nebula, locus and stork awards for many times). He is one of the main POV characters in the book.

Jon Snow is the illegitimate son of ED stark, Duke of Winterfell (ED stark lied to others). Born in 283, he is nicknamed "Lord snow", "illegitimate son of Winterfell" and "illegitimate son on the Great Wall". At the same time, he is also a shapeshifter (wolf spirit). His ice wolf is a "white spirit" with white hair and red eyes.

About Jon Snow There are many rumors that he is the son of ED stark and miss ashara Dane of the falling star city. Ed stark told Robert baratheon that Jon was born to him and Vera, while godrich Bonaire, the Earl of sweet sister Island, thinks Jon is the son of ED stark and a fisherman. Most readers think he is rega targaryan and Son of Leona stark.

Source: @evudlc