“Hallowe’en” signifies “Holy people’s evening”.[ It originates from a Scottish expression for All Hallows’ Eve (the night prior to All Hallows’ Day). And Into The Forest I Go To Lose My Mind And Find My Soul 3d. In Scots, “eve” is even, and this is contracted to e’en or een.
After some time, (All) Hallow(s) E(v)en advanced into Hallowe’en. And Into The Forest I Go To Lose My Mind And Find My Soul 3d. In spite of the fact that the expression “All Hallows'” is found in Old English “All Hallows’ Eve” is itself not seen until 1556.