I just found documentation of a Thomas J. Murphey buried in Greycourt Cemetery in Orange Co., NY. Thomas was b. 1822 and d. 1870. So far I do not have anything more than oral history to connect this Thomas Murphey to my family, but my oral history has a Thomas Murphey married to a Mary Reddy, Thomas being brother to James J. Murphy, who was m. to Bridget Reddy, sister to Mary Reddy.
Eventually descendents of this family settled in Brooklyn as well.
I also just got a response to a quirey about Reddy's in Ireland and though we do not have a connection at this point, you might check out this person with your firstname.lastname@example.org
Good luck and please keep in touch.