Visions & illusions
(covers information from a vision or illusion)

Matthew Picard was Jean-Luc Picard's son during his Nexus experience in 2371.

Captain Picard encountered him at a Christmas celebration that he imagined, as having children and carrying on the Picard family line was one of his deepest wishes, but he decided to return to reality. (Star Trek Generations)

Matthew Picard was played by young actor Matthew Collins, whose real-life sister Mimi Collins also played a Picard child, Mimi Picard.
According to the Star Trek Encyclopedia (3rd ed., p. 324), Matthew Picard was ten years old.
Community content is available under CC-BY-NC unless otherwise noted.