I looked at every reasonable scenario and read many opinions from many forums.  Here are those scenarios. Ned Stark + Daughter of a Fisherman = bastard Jon Ned Stark + Ashara Dayne = bastard Jon Mance Rayder + Lyanna Stark = wildling bastard Jon Brandon Stark + Lyanna Stark = bastard Jon Brandon Stark + Ashara Dayne = bastard Jon Rhaegar + Lyanna = royal bastard Jon Ned Stark + Wyla = bastard Jon Polygamy is not an accepted practice.  Aegon ma