"The faun is now regarded rather as the type of unsophisticated & the satyr of unpurified man; the first is man still in intimate communion with Nature, the second is man still swayed by bestial passions." [Fowler]The plural is fauni.
"Children learn from the slaves some odd phrases ... as ... will you all do this? for, will one of you do this?" ["Arthur Singleton" (Henry C. Knight), "Letters from the South and West," 1824]