Ælfwig is an Old English masculine name composed of the elements ælf 'elf' and wig 'war, battle', thus meaning 'elf-battle' or 'battle with elves'. The name is found in pre-Norman England and belongs to the tradition of Anglo-Saxon name formation, where two meaningful components were combined to convey strength or heroic qualities. Though obscure today, it has a documented historical bearer: Ælfwig (died c. 1035) served as a medieval Bishop of London. He was consecrated on 16 February 1014 and acceded to the bishopric some time between 1015 and 1018. The name does not appear in later English usage, as many Anglo-Saxon names fell out of favor after the Norman Conquest of 1066. Its elements survive in other compound names like Ælfwine ('elf-friend') or the closely related masculine name Wiglaf ('war-survivor').