Bible Encyclopedias
John Xvii (or Xviii)

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

John XVII (or XVIII)

Pope, succeeded Sylvester II in 1003, and died four months after his election.

Bibliography Information
McClintock, John. Strong, James. Entry for 'John Xvii (or Xviii)'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​j/john-xvii-or-xviii.html. Harper & Brothers. New York. 1870.