1560s, "one who shoes horses," from French ferrier "blacksmith," from Latin ferrarius "blacksmith," noun use of adjective meaning "of iron," from ferrum "iron" (in Medieval Latin, also "horseshoe"); see ferro-. An earlier form of it in English was ferrer, ferrour "ironsmith" (late 12c. as a surname), from Old French ferreor, from Medieval Latin ferrator "blacksmith."
Old English feortan, ultimately from PIE *perd- (source also of Old High German ferzan, Old Norse freta, Danish fjerte, Sanskrit pard, Greek perdein, Lithuanian perdžiu, persti, Russian perdet), of imitative origin. Related: Farted; farting. As a noun, from late 14c.
Clatterer or clatterfart, which wyl disclose anye light secreate. [Richard Huloet, "Abecedarium Anglo-Latinum," 1552]