But he had not left the Wall for that; he had left because he was after all his father's son, and Robb's brother. The gift of a sword, even a sword as fine as Longclaw, did not make him a Mormont. (71 Jon 9.16)
Oh, Jon, still going back and forth in his mind: Stark or Night's Watch? Night's Watch or Stark? Bottom line: nothing can separate you completely from your family.