Answer:
John is Granny's husband.
Explanation:
John was Granny Weatherall's later husband, and the father of their children. The story doesn't reveal much about him, other than the fact that he died fairly young, had blue eyes, and was a good man. Granny loved and respected him. Another of Granny's children, whose hand she holds as she dies. John died when he was a young man, and Granny's memories suggest that he was a kind husband and father.
Hope it helps!
