Where does “Sonday” come from?

Sonday (Middle English) comes from Old English sunnandæg, from Proto-Germanic *Sunnōn dag, from Latin dies Solis, from Latin sōl, from Proto-Indo-European sóh₂wl̥ — sun.

Ancestry of “Sonday”, step by step

Step	Language	Word	Meaning
1	Old English	sunnandæg	Sunday
2	Proto-Germanic	*Sunnōn dag	—
3	Latin	dies Solis	sun's day
4	Latin	sōl	—
5	Proto-Indo-European	sóh₂wl̥	sun

Every word from Proto-Indo-European sóh₂wl̥ →

Sonday — Etymology, Origin & Word History | Etymology Explorer