Where does “Krishnan” come from?

Krishnan (English) comes from Tamil கிருஷ்ணன், from Sanskrit कृष्ण, from Proto-Indo-Aryan kr̥ṣnás, from Proto-Indo-Iranian kr̥šnás, from Proto-Indo-European kr̥snós, from Proto-Indo-European kers- — black, dirty; run; to run.

Ancestry of “Krishnan”, step by step

StepLanguageWordMeaning
1Tamilகிருஷ்ணன்Krishna
2Sanskritकृष्णblack, dark, dark-blue; black or dark-blue;...
3Proto-Indo-Aryankr̥ṣnás—
4Proto-Indo-Iraniankr̥šnásblack, dark
5Proto-Indo-Europeankr̥snósblack; dark, dusky
6Proto-Indo-Europeankers-black, dirty; run; to run
Every word from Proto-Indo-European kers- →Every word from Proto-Indo-European kr̥snós →Every word from Proto-Indo-Iranian kr̥šnás →