Where does “Candidatus” come from?

Candidatus (Translingual) comes from Latin candidātus, from Latin candidus, from Latin candeō, from Proto-Italic kandēō, from Proto-Indo-European kand- — to shine, glow.

Ancestry of “Candidatus”, step by step

Step	Language	Word	Meaning
1	Latin	candidātus	—
2	Latin	candidus	shining white; clear, bright; fair, beautiful
3	Latin	candeō	—
4	Proto-Italic	kandēō	—
5	Proto-Indo-European	kand-	to shine, glow

Every word from Proto-Indo-European kand- →

Candidatus — Etymology, Origin & Word History | Etymology Explorer