Where does “कार्तिक” come from?

कार्तिक (Sanskrit) comes from Sanskrit कार्त्तिक, from Sanskrit कृत्तिका, from Sanskrit -का.

Ancestry of “कार्तिक”, step by step

Step	Language	Word	Meaning
1	Sanskrit	कार्त्तिक	—
2	Sanskrit	कृत्तिका	Pleiades
3	Sanskrit	-का	—

Words derived from “कार्तिक”

Every word from Sanskrit -का →

कार्तिक — Etymology, Origin & Word History | Etymology Explorer