Nevertheless, as Brad Bird’s tweet bluntly laid out for the fans who posed the question to him, it doesn’t change the fact that Jack-Jack was named for a reason that was far more personal to Bird’s own life.
With all of that said, it’s not entirely surprising to learn that some fans have taken to thinking that Jack-Jack’s name is a reference to the son of John F. Kennedy.
After all, the two Incredibles movies that have been released thus far DO take place in the 1960s, which means that it’s possible that a fictionalized and animated version of JFK existed at some point on that timeline.