Brian Williams (Dinosaurs on a Spaceship)

Brian Williams is the father of Rory Williams, paternal grandfather of River Song, and father-in-law of Amy Pond.

Biography
He first met The Doctor when the TARDIS materialized around him when he was attempting to help Rory and Amy change a light bulb at their house. He has always hated traveling, but after his adventure on a spaceship with dinosaurs and getting to see Earth from space, he began traveling around the world and sending homemade postcards back to his son and daughter-in-law.