Julia Franklin
Julia Franklin was a human pathologist. She first met her future husband Bob when she started at a local hospital as a junior pathologist. (PROSE: The Devil Goblins from Neptune)
Julia met Barbara Wright and her son John in 1973 London. (PROSE: Byzantium!)
The Franklins encountered the Fifth Doctor in Los Angeles in 1999. (PROSE: The King of Terror)
On their 40th wedding anniversary sometime in the early 21st century, they picked up the hitchhiking Seventh Doctor whilst driving to Redborough. (PROSE: The Hollow Men)
Behind the scenes
Julia Franklin and her husband Bob have encountered various incarnations of the Doctor in several Keith Topping novels, never realising the connection. (REF: I, Who 3)