Source : Webster's Revised Unabridged Dictionary (1913)

Jeronymite \Je*ron"y*mite\, n. (Eccl. Hist.)
   One belonging of the medi[ae]val religious orders called
   Hermits of St. Jerome. [Written also {Hieronymite}.]

Hieronymite \Hi`er*on"y*mite\, n. [From St. Hieronymus, or
   Jerome.] (Eccl.)
   See {Jeronymite}.