 The major storyline of the Revenant movie is Hugh Glass's quest for revenge on John Fitzgerald for killing his half Pawnee's son, Hawk. There is no evidence Glass had an Indian wife or mixed race son. According to one contemporary, Glass lived with a Pawnee before his fur trade career. While this cannot be verified, it is at least plausible. If Glass did live with a Pawnee, it's possible he had a Pawnee wife and child. However, that is pure speculation. He certainly had no son on the Henry expedition, and at most Glass lived for three to four years with the Pawnee, so he would not have had a son of Hawk's age by 1823.