In the lead-up to the 6 day war, the west bank Palestinians were encouraged to move to Jordan so they wouldn’t be in the way of the Arab forces. They were assured that once Israel was destroyed they could move back home. When that didn’t work out, Jordan got fed up with the PLO and drove them out in 69-70. So if the family moved here from Jordan in the sixties, Palestinian would be a significant possibility.
That makes perfect sense of how Jordon got thrown in the mix of all of this.