is demonstrated by this video from the excellent DiscoverUU :
The Unitarian Universalist Association was created in 1961- only four people in that list lived beyond that date. The others may have been Unitarians, (although technically, some of them must have been Congregationalists, as the AUA wasn't formed until 1825), or they may have been Universalists, but they weren't Unitarian Universalists. Actually, I suspect that many of them, were they alive today, would be UCC rather than UUA.
What is this tendency we have to claim any celebrity in all of history who doesn't have a formal declaration of belief in the Nicean Creed on record as one of ours? Are we insecure about the comparative youth of our denomination, like a fuzzy bunny Wiccan who claims unbroken descent from Lilith? Whatever it is, I wish we'd stop; there's plenty to be proud of in the UUA's short history, and we should be touting that- we don't need to borrow glory from predecessors who may or may not even agree with what we are today.