fuinneog (Irish) comes from Middle Irish fuindeóc, from Old Norse vindauga, from Old Norse vindr, from Proto-Germanic windaz, from Proto-Indo-European h₂wéh₁n̥ts, from Proto-Indo-European h₂wḗh₁ti, from Proto-Indo-European h₂weh₁- — to blow.
fuinneog (Irish): window