Etymology
From Middle English mydge, migge, from Old English mygg, myċġ (“midge, gnat”), from Proto-West Germanic *muggju, from Proto-Germanic *mugjō, from Proto-Indo-European *mū- (“fly, midge”), *mu-, *mew-.
The dialectal sense of "short person" was originally figurative, and gave rise to midget (“short person”) via the diminutive suffix -et, which has since become part of standard English with that meaning; this has caused midge to undergo rebracketing as a clipping of midget.
Cognates
* Scots mige (“midge”)
* Saterland Frisian Määge (“gnat, mosquito”)
* West Frisian mich (“fly, mosquito”)
* West Flemish meezje (“midge, mosquito”)
* Dutch mug (“midge, gnat, mosquito”)
* German Low German Mügge (“midge, gnat, mosquito”)
* German Mücke (“midge, gnat, mosquito”)
* Swedish mygg, mygga (“midge, gnat,