Old English sceaphierde, from sceap "sheep" (see sheep) + hierde "herder," from heord "a herd" (see herd (n.)). Cf. Middle Low German, Middle Dutch schaphirde, Middle High German schafhirte, German dialectal Schafhirt. Shepherds customarily were buried with a tuft of wool in hand, to prove on Doomsday their occupation and be excused for often missing Sunday church. Shepherd's pie is recorded from 1877.
1790, "to herd sheep," from shepherd (n.). The metaphoric sense of "watch over or guide" is first recorded 1820. Related: Shepherded; shepherding.