α. early Middle English illc an ( Ormulum), early Middle English illcan ( Ormulum), Middle English ilk an, Middle English ilk ane, Middle English ilkan, Middle English ylkan; Scottish pre-1700 ilk ane, pre-1700 (2000s– literary) ilkane, 1800s ilken.
β. Chiefly northern and north-east midlands Middle English hilk a, Middle English il a (probably transmission error), Middle English ilc a, Middle English ilk a, Middle English ilkay, Middle English ilke a, Middle English ylk a, Middle English ylka, Middle English ylka a, Middle English ylkay, Middle English ylke a, Middle English (1800s English regional (northern)) ilka, late Middle English alkay, late Middle English yka (probably transmission error); Scottish pre-1700 ilk a, pre-1700 ilke a, pre-1700 1700s– ilka, pre-1700 1700s– ilky, pre-1700 1900s– ilkie, 1900s ulky, 1900s– ilkae, 1900s– ilki.