dual of masculine form of אֶפְרָת; double fruit; Ephrajim, a son of Joseph; also the tribe descended from him, and its territory; Ephraim, Ephraimites.
from שָׁפָה (compare שִׁפְחָה); a family, i.e. circle of relatives; figuratively, a class (of persons), a species (of animals) or sort (of things); by extension a tribe or people; family, kind(-red).