α. Middle English fedyrfoy, Middle English fetherfoie, Middle English fetherfoy, Middle English fetherfoye, Middle English fethirfoy, Middle English fethirvoy, Middle English feþerfoiȝe, Middle English feþerfoy, Middle English feþerfoye, Middle English feþeruoyȝe, Middle English feþervoye, Middle English ueþeruoye, Middle English vereuoy (perhaps transmission error), Middle English vethervoye, Middle English weyervoy (perhaps transmission error), 1500s–1600s weythernoy (south-western, perhaps transmission error), 1600s weytherney (perhaps transmission error), 1800s featherfoy (English regional (Gloucestershire)).
β. late Middle English fedirfew, late Middle English fedyrfewe, late Middle English fetherfewe, late Middle English fethirfewe, 1500s federfewe, 1500s–1700s fetherfew, 1600s– featherfew; English regional 1800s feathyfew (Devon), 1800s fitherfew (Shropshire).
γ. late Middle English fedyrfu, late Middle English fedyrfwe, late Middle English fethirfue, 1600s fetherfue; N.E.D. (1895) also records a form late Middle English federfu.
δ. late Middle English ffethirfoyle; English regional 1800s featherfahl (Yorkshire), 1800s featherfeuil (Yorkshire), 1800s featherfewl (northern), 1800s featherfooly (Northumberland), 1800s featherfowl, 1800s featherful (northern); Scottish 1800s featherfooly (Roxburghshire), 1800s featherfowlie, 1800s featherfull, 1800s featherfully (Berwickshire), 1900s featherfoullie (Perthshire).
ε. Middle English fetterfowe (in a late copy), Middle English ffetterfoe (in a late copy); English regional 1800s veathervaw (Devon), 1800s vethervow (south-western).
