4. Probably Sarah Sever, a niece of James Warren, who married Thomas Russell in 1784 (see vol. 4:153, note 1).
Cite web page as: Founding Families: Digital Editions of the Papers of the Winthrops and the Adamses, ed.C. James Taylor. Boston: Massachusetts Historical Society, 2007.
http://www.masshist.org/ff/