Etymology

cp. OIcel vind-auga ‘window’ < PGmc *wenðaz + *augōn ‘wind + eye’; cp. OE ēage, Go áugō, OFris āge, OS ōga, OHG ouga.  The compound is unique to ON.

PGmc Ancestor

*wenðaz + *augōn

Proposed ON Etymon (OIcel representative)

vind-auga ‘window’ 
(ONP vindauga (sb.))

Other Scandinavian Reflexes

Far vindeyga, Icel vindauga, Norw vindauga, Dan vindue, Sw dial vindöga

OE Cognate

ēage 'eye'

Phonological and morphological markers

Summary category

A1*

Attestation

Widespread from early in ME (revisions to AW).

Occurrences in the Gersum Corpus

Gaw 1743; Cl 318, 453; WA 769*, 945, 3835 etc.

Bibliography

MED windou(e (n.) , OED window (n.) , HTOED , Dance wyndow, Bj. 72, de Vries vindauga; auga, Mag. vindauga; auga, Bj-L. øye, Orel *au3ōn, Kroonen *augōn-, AEW ēage