α. early Middle English illc an ( Ormulum), Middle English ilc an, Middle English ilc ane, Middle English ilk ane, Middle English ilkan, Middle English ilkane, Middle English ilke an, Middle English ilke ane, Middle English ylkane, Middle English ylkean; English regional (northern) 1600s ilk yean (Yorkshire), 1600s 1800s ilk ane, 1800s ilk yen (Lancashire); Scottish pre-1700 ilkain, pre-1700 ilkan, pre-1700 ylk ane, pre-1700 ylkan, pre-1700 ylkane, pre-1700 1700s ilk an, pre-1700 1700s ilke ane, pre-1700 1700s 1900s– ilkane, pre-1700 1700s– ilk ane, 1800s ilk yen, 1800s ilk-ane, 1800s ilkin, 1900s– ilk een (north-eastern), 1900s– ilkeen (north-eastern), 2000s– ilk yin.
β. Middle English ilc one, Middle English ilcon, Middle English ilke one, Middle English ilkone, Middle English ilkoone, Middle English ylke on, Middle English ylke oon, Middle English ylkeone, Middle English ylkon, Middle English ylkone, Middle English ylkoon, Middle English 1600s ilkon, Middle English (1800s English regional (Cumberland)) ilcone, late Middle English iklon (transmission error); Scottish pre-1700 ilk on, pre-1700 ilk one, pre-1700 ilkone.
