earwig: [OE] A colloquial Old English term for ‘insect’ was wicga (which would have been pronounced something like ‘widger’). It probably came from the same prehistoric Germanic base (*wig-) as produced English wiggle [13], and so is roughly equivalent in spirit to modern English creepy-crawly. There used to be a belief (perhaps still is) that earwigs creep into people’s ears and penetrate inside their heads, and so the Anglo-Saxons called them ēarwicga, literally ‘ear-insect’. The same notion lies behind French perceoreille, literally ‘pierceear’, and German ohrwurm, literally ‘earworm’, both of which stand for ‘earwig’. => wiggle
earwig (n.)
type of insect (Forficula auricularia), Old English earwicga "earwig," from eare (see ear (n.1)) + wicga "beetle, worm, insect," probably from the same Germanic source as wiggle, on the notion of "quick movement;" perhaps distantly related to PIE root *wegh- "to go." So called from the ancient and widespread (but false) belief that the garden pest went into people's ears. Compare French perce-oreille, German ohr-wurm. A Northern England name for it reported from 1650s is twitch-ballock.
