Source Information
Ancestry.com. Throckmorton Family History [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005.Original data: Sitherwood, Frances Grimes,. Throckmorton family history : being the record of the Throckmortons in the United States of America with cognate branches, emigrant ancestors located at Salem, Massachusetts, 1630, and in Gloucester County, Virginia, 1660. Bloomington, Ill.: Pantagraph Printing & Stationary Co., 1929.
