An Etymological Dictionary of the German Language/Farre
Appearance
Farre, m., ‘bullock, bull,’ from the equiv. MidHG. varre, var, m., OHG. farro, far, m.; corresponding to Du. varre, var, ‘bull,’ AS. fearr, m., OIc. farre, m., ‘bull.’ Since there is a corresponding fen. form, Färse, the rr must have originated in rz (rs), (comp. dürr, irre). —