α. Middle English olenght, Middle English o length, Middle English o leynþe.
β. Middle English a lenght (in a late copy), Middle English alengþe, Middle English a lengþe, Middle English a-lengþe, Middle English–1500s alengthe, 1500s a length, 1500s–1800s alength; Scottish (northern and north-eastern) 1800s a-len'th, 1800s– alenth.