Where does “Donderdag” come from?
Donderdag (Afrikaans) comes from Dutch donderdag, from Middle Dutch donresdach, from Old Dutch thonaresdag, from Proto-Germanic *Þunras dag, from Latin dies iovis, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous — to be bright; sky, heaven.
Donderdag (Afrikaans): Thursday
Ancestry of “Donderdag”, step by step