heresiarch - Wiktionary
(religion) The founder of a heresy, or a major ecclesiastical proponent of such a heresy. [from mid 16th c.] Synonym: arch-heretic 1838, James Henthorn Todd, “Note D.—See Lecture I. p. 34. The Fratricelli, and Beguins.”, in Discourses on the Prophecies Relating to Antichrist in the Writings of Daniel and St. Paul; […], Dublin: Printed at the ...
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