From Proto-Brythonic, borrowed through Vulgar Latin from Latin sōl (“the sun”)

Gujaratilexicon.com [Gujarati-English dictionary], Arnion Technologies, 2009. https://www.gujaratilexicon.com/dictionary/gujarati-to-english-translation/%E0%AA%B0%E0%AA%B5%E0%AA%BF%E0%AA%B5%E0%AA%BE%E0%AA%B0 

Dāsa, Śyāmasundara (1965–1975),Hindī Śabdasāgara, Kashi [Varanasi]: Nagari Pracarini Sabha https://dsal.uchicago.edu/cgi-bin/app/dasa-hindi_query.py?qs=%E0%A4%B8%E0%A5%82%E0%A4%B0%E0%A5%8D%E0%A4%AF%E0%A4%B5%E0%A4%BE%E0%A4%B0&searchhws=yes&matchtype=exact 

Dāsa, Śyāmasundara (1965–1975), Hindī Śabdasāgara, Kashi [Varanasi]: Nagari Pracarini Sabha https://dsal.uchicago.edu/cgi-bin/app/dasa-hindi_query.py?qs=%E0%A4%AD%E0%A4%BE%E0%A4%A8%E0%A5%81%E0%A4%B5%E0%A4%BE%E0%A4%B0&searchhws=yes&matchtype=exact 

Learned borrowing from Sanskrit भानुवार (bhānuvāra).

https://dsal.uchicago.edu/cgi-bin/app/kittel_query.py?qs=%E0%B2%AD%E0%B2%BE%E0%B2%A8%E0%B3%81%E0%B2%B5%E0%B2%BE%E0%B2%B0&searchhws=yes&matchtype=exact

Sastra Jawa | Javanese Literary, Surakarta, 2023. https://www.sastra.org/leksikon?keyword=raditya 

Balinese–Indonesian Dictionary [Kamus Bahasa Bali–Indonesia] (in Balinese), Denpasar, Indonesia: The Linguistic Center of Bali Province [Balai Bahasa Provinsi Bali]. https://kamusbahasaprovinsibali.kemdikbud.go.id/bali-indonesia/cari/redite 

iryoil (일요일) 'sun' + 'day' = 'Sunday'

Walther von Wartburg (1928–2002), “domĭnicus”, in Französisches Etymologisches Wörterbuch (in German), volume 3: D–F, page 129

Bound morpheme. This word only appears in terms in conjunction with other words, such as dydd Sul (“Sunday”) and nos Sul (“Sunday night”). 

Bucaklişi, İsmail Avcı; Uzunhasanoğlu, Hasan (1999), Lazca-Türkçe Sözlük / Lazuri-Turkuli Nenapuna [Laz–Turkish dictionary] (in Turkish), Istanbul: Akyüz Yayıncılık, page 11

Warrier, M. I. (2008) Malayalam-English Dictionary, 22nd edition, Kottayam: DC Books https://dsal.uchicago.edu/cgi-bin/app/variyar_query.py?qs=%E0%B4%9E%E0%B4%BE%E0%B4%AF%E0%B5%BC&searchhws=yes&matchtype=exact 

Kajaia, Otar (2005), Megrul-kartuli leksiḳoni [Mingrelian–Georgian Dictionary], online version prepared by Joost Gippert, Frankfurt am Main, published 2001–2004, page 1198 https://archive.org/stream/kajaia#page/n1197/mode/1up 

Earl C. Haag, Pennsylvania German Reader and Grammar (2010)

Dondua, Ḳarṗez (2001) Svanur-kartul-rusuli leksiḳoni (lašxuri dialekṭi) [Svan–Georgian–Russian Dictionary (Lashkh dialect)] (Kartvelologiuri biblioteḳa; 6), revised and prepared for publication by Aleksandre Oniani, Tbilisi: Tbilisi State Pedagogical University Press, page 211a
Nižaradze, B. Š. (2012) Gruzino-svansko-russkij slovarʹ. Verxnebalskij dialekt [Georgian–Svan–Russian Dictionary: Upper Bal Dialect], 2nd edition, prepared for publication and prefaced by Lela Nižaradze, Tbilisi: Universal, page 129a
Topuria, Varlam; Kaldani, Maksime (1994) Svanuri leksiḳoni [Svan Dictionary] (in Georgian), Tbilisi: Merani-3 Publishing, page 1273 https://archive.org/stream/SvanGeorgianDictionary/Svan-Georgian%20dictionary#page/n1272/mode/2up 

nyi ma can refer to Sunday as ellipsis of gzā-nyi-ma

https://dictionary.christian-steinert.de/#home

From Old Frisian *sunnandei, from late Proto-West Germanic *sunnōn dag 'day of the sun', a calque of Latin diēs Sōlis. 

The Language and Culture Atlas of Ashkenazic Jewry: The Eastern Yiddish - Western Yiddish Continuum, Volume III, Niemeyer, 2010, p. 92-93