Colin Baker was a Human who was kin to descendants of Clare Raymond. His name briefly appeared among the Raymond family genealogy on the computer display pulled up by Deanna Troi.
Some of Colin Baker's direct relatives include Tom Baker, Peter Davidson, William Hartnell, Jon Pertwee, and Patrick Troughton. (TNG: "The Neutral Zone")
Colin Baker 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.