UppruniFrom Old Norse sunna, from Proto-Germanic *sunnǭ, from Proto-Indo-European *sh₂wen- < *sóh₂wl̥ (“sun”).
Germanic cognates: Faroese sunna, English sun, West Frisian sinne, Low German Sünn, Zunne, Dutch zon, German Sonne, Gothic 𐍃𐌿𐌽𐌽𐍉 (sunnō).
Indo-European cognates: Sanskrit स्वर् (svar), Greek ἥλιος (ílios), Latin sol, Old Church Slavonic слъньце (slŭnĭce), Russian солнце (solnce), Latvian saũle, Welsh haul.
Beygingarsunnu(genitive, singular) · sunnur(nominative, plural) · sunna(indefinite, nominative, singular) · sunnan(definite, nominative, singular) · sunnur(indefinite, nominative, plural) · sunnurnar(definite, nominative, plural) · sunnu(accusative, indefinite, singular) · sunnuna(accusative, definite, singular) · sunnur(accusative, indefinite, plural) · sunnurnar(accusative, definite, plural) · sunnu(dative, indefinite, singular) · sunnunni(dative, definite, singular) · sunnum(dative, indefinite, plural) · sunnunum(dative, definite, plural) · sunnu(genitive, indefinite, singular) · sunnunnar(definite, genitive, singular) · sunna(genitive, indefinite, plural) · sunnanna(definite, genitive, plural)
Heimild: Wiktionary