Definition of "hæresiarch"

He died in 1223, and seems to have had no successor; not is it an ascertained point that more than one such hæresiarch was ever recognized.

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 University Press; London: J. G. F. and J. Rivington; […], published 1840, footnote h, pages 463–464