My family of Agnews were from Georgia. Marietta, GA was named after a family member named Mary Etta Agnew, and Tucker, GA after her husband Dan Tucker who used to drive turkeys thru Atlanta before the Civil War. Many Agnews married into the Bomar (De Bomaere/ De Bomar) family of which one became the Second Mayor of Atlanta and is burried there with a State Memorial. (I have photos of theese gravesites). There were many Benjamins(i.e. one Benjamin Franklin Bomar) of Agnew origin. May Williams, Marys and other names you have listed run in my Agnew family. Some of that family further moved to Alabama. I will research further to see if I can identify anyone for you .