I am a lineal male descendant of Thomas Bird of Hartford, CT, who died there in 1662. In the past, he was often confused with your Thomas Bird of Dorchester, but it was determined years ago that these were two different men. However, there are some striking naming similarities in these two families for several generations, even down to men born in the late 18th and early 19th centuries with the first name "Zenas". These are the only Zenas Bird males found anywhere and it is notable that both Thomases had male Bird descendants with that name. Also, the names James and Samuel show up frequently in both families although these names are of course much more common.
I've had extensive DNA testing done over the years and have a very extensive Y DNA profile available (including the FtDNA Big-Y test.) I would like to compare it with any lineal male descendant of Thomas Bird of Dorchester to see if there is a match. If there is a male descendant who has NOT been tested but would be willing, I would be happy to pay for the test. Please contact me at sbird1000@hotmail.com for further information.