When asked what he thought was "Jon's biggest 'mistake'", Martin replied: Parentage The identity of Jon's mother has created much speculation among readers of the series, and guessing her identity was the test Martin gave Benioff and Weiss when they approached him in March 2006 about adapting his novels into a TV series. In the novels, characters believe that she could be a servant named Wylla, or the noblewoman Ashara Dayne. The popular fan theory—called R+L=J, an abbreviation of "Rhaegar + Lyanna = Jon"—proposes that Jon is not the son of Ned at all, but is actually the son of Rhaegar Targaryen and Ned's younger sister Lyanna Stark, and Ned feigned dishonor and claimed the nephew to be his own child in order to protect Jon from harm. Though the character is presented as the illegitimate son of Ned Stark, David Orr voiced the doubt of some readers when he wrote in The New York Times in 2011, "Jon Snow is presented as the illegitimate son of the Stark patriarch, although it's uncertain whether Stark is indeed his father." Actor Sean Bean, who portrays Ned in the HBO television series, said when asked in a 2014 interview about returning to the series to appear in flashbacks, "I've definitely got some unfinished business that needs to be resolved there. I'm obviously not Jon Snow's dad. And you need that to be revealed at some point, don't you?" The uncertainty arises from anecdotal evidence in the texts interpreted by readers to connect the mysterious maternity of Ned's son with the vague backstory of his sister Lyanna. As recounted by Ned in A Game of Thrones, at a tourney years before the events of the novel, Rhaegar had shown public favor to Lyanna in the presence of his own wife, the Dornish princess Elia Martell. When Rhaegar and Lyanna disappeared a year later, her father Rickard and eldest brother Brandon confronted Rhaegar's father, the "Mad King" Aerys Targaryen, demanding that his son return the abducted Lyanna. Aerys had Rickard and Brandon brutally executed for their insolence, inciting Ned and his friend Robert Baratheon, Lord of Storm's End and Lyanna's betrothed, to rebel against Aerys. In what later became known as Robert's Rebellion, Aerys was overthrown and Rhaegar was killed by Robert in single combat. After a bloody battle against three of Aerys' Kingsguard protecting the Tower of Joy in Dorne, Ned found Lyanna