Drona comes from Sanskrit द्रोण, from Proto-Indo-Iranian dráwnam, from Proto-Indo-European dréw-no-m, ultimately from Proto-Indo-European dóru meaning wood or tree.
Drona (English): The royal guru to Kauravas and Pandavas in Mahabharata
Definitions
The royal guru to Kauravas and Pandavas in Mahabharata
Ancestry of “Drona”, step by step
Drona traces back through two separate lines of ancestry.