I found the answers to your question about the Brownell family on the Hazard Index. They were also members of the Society of Friends and had moved to Washington County, NY, around February of 1812, from Westport, MA, where they had been members of the Acoakset Friends Meeting.
Thomas' parents were Shadrach and Mary Brownell. I don't have Mary's maiden name. They had five children: Roby, Anna, Thomas, Elijah and Deborah.
Shadrach was born at Westport, MA, Feb 21, 176_ and died at East Hoosack February 7, 1813. His wife, Mary was born at New Bedford, MA, September 5, 1774.
The children, all born at Westport, MA, were:
Roby, born Dec 25, 1796; Anna, born Nov 26, 1798; Elijah, born Aug 12, 1806 Deborah, born Sept 10, 1808. Thomas was born at Westport, Aug 14, 1801. His wife, Susan or Susannah (Anthony) Brownell, was born at Adams, MA, August 4, 1795 and died there April 23, 1821. (198 years ago today!! Which, is also my birthday, coincidentally enough)
I have Brownell on my family tree but I just noticed that Thomas is not on WikiTree, nor is his wife. I'm not sure if Shadrach has a profile....
Hope this helps!