Where does “Thuresday” come from?

Thuresday (Middle English) comes from Old English þursdæġ, from Proto-Germanic *Þunras dag, from Latin dies iovis, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous, from Proto-Indo-European dyḗws, from Proto-Indo-European dyéws — to be bright; sky, heaven.

Ancestry of “Thuresday”, step by step

Thuresday traces back through two separate lines of ancestry.

via Old English þursdæġ

StepLanguageWordMeaning
1Old EnglishþursdæġThursday
2Proto-Germanic*Þunras dag
3Latindies iovisThursday
4LatindiēsA day, particularly
5Proto-Italicdjēmaccusative singular of *djous
6Proto-Italic*djous
7Proto-Indo-Europeandyḗwssky, heaven; sky god
8Proto-Indo-Europeandyéwssky, heaven
9Proto-Indo-Europeandyew-to be bright; sky, heaven

via Old English þurresdæġ

StepLanguageWordMeaning
1Old EnglishþurresdæġThursday
2Old EnglishþunresdæġThursday

Words derived from “Thuresday

Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws