Where does “迦膩色伽” come from?

迦膩色伽 (Chinese) comes from Sanskrit कनिष्क, from Bactrian Κανηϸκο.

Ancestry of “迦膩色伽”, step by step

Step	Language	Word	Meaning
1	Sanskrit	कनिष्क	—
2	Bactrian	Κανηϸκο	—

迦膩色伽 — Etymology, Origin & Word History | Etymology Explorer