William Hartnell
From Memory Alpha, the free Star Trek reference
William Hartnell was a Human who was kin to descendants of Clare Raymond.
William Hartnell's name was read out in a computer display of the Raymond family's genealogy, along with others such as Colin Baker, Tom Baker, Peter Davidson, Jon Pertwee and Patrick Troughton. (TNG: "The Neutral Zone")
William Hartnell 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.
