James “Jim“ Jackson was the husband of Estelle Jackson and the father of Sally Jackson.[1] He was the human grandfather of Percy Jackson.


Sally Jackson, his daughter

Jim Jackson and his wife, Estelle, both died on a plane flight when it crashed down in a field 150 miles south of Lake Ontario at 3 A.M. No one survived the crash and the cause of the crash was left unknown.

His daughter, Sally, was orphaned and taken in by his brother, Rich Jackson.

Percy Jackson and the Olympians

The Lightning Thief

Percy mentions his grandfather’s death when talking about his mother’s backstory.


According to his obituary, Jim was a kind man who often helped out his neighbors.


  • Jim is short for James, a name derived from the Hebrew name Jacob.
  • Jackson is a very common surname of English and Scottish origin, coming from “son of Jack“.


  1. Percy Jackson: The Ultimate Guide, page 13
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