Jon Pertwee was a Human who was kin to descendants of Clare Raymond.
Jon Pertwee's name was seen on a computer display of the Raymond family's genealogy, along with others such as Colin Baker, Tom Baker, Peter Davidson, William Hartnell, and Patrick Troughton. (TNG: "The Neutral Zone")
Jon Pertwee and others in the list seem to be references to actors who have played the lead role of the Doctor in the long-running British science fiction series Doctor Who.