Esther Root is a character in the novel Raintree County by Ross Lockridge. The daughter of Gideon Root and his wife (whom Lockridge does not name), she became the second wife of John W. Shawnessy; their daughter was Eva Alice Shawnessy.

In Doc Savage: His Apocalyptic Life, Philip José Farmer identifies Esther's mother as Fern Bumppo Root, suggesting Esther's descent from Natty Bumppo. More reliably, she is an ancestress of Kilgore Trout.

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