Where does “ధీరుడు” come from?

ధీరుడు (Telugu) comes from Sanskrit धीर, from Sanskrit धी.

ధీరుడు (Telugu): hero; a brave man; a learned man

Definitions

Step	Language	Word	Meaning
1	Sanskrit	धीर	steady, constant, firm, resolute, brave,...
2	Sanskrit	धी	—

ధీరుడు — Etymology, Origin & Word History | Etymology Explorer