Where does “त्रिकोण मंदाकिनी” come from?

त्रिकोण मंदाकिनी (Hindi) comes from Hindi त्रिकोण, from Sanskrit त्रिकोण, from Sanskrit त्रि, from Proto-Indo-Aryan tráyas, from Proto-Indo-Iranian tráyas, from Proto-Indo-European *tréyes.

त्रिकोण मंदाकिनी (Hindi): Triangulum Galaxy

Definitions

Triangulum Galaxy

Ancestry of “त्रिकोण मंदाकिनी”, step by step

त्रिकोण मंदाकिनी traces back through two separate lines of ancestry.

via Hindi त्रिकोण

Step	Language	Word	Meaning
1	Hindi	त्रिकोण	triangle
2	Sanskrit	त्रिकोण	triangle; triangular, a triangle
3	Sanskrit	त्रि	three
4	Proto-Indo-Aryan	tráyas	three
5	Proto-Indo-Iranian	tráyas	three
6	Proto-Indo-European	*tréyes	—

via Hindi मंदाकिनी

Step	Language	Word	Meaning
1	Hindi	मंदाकिनी	galaxy
2	Sanskrit	मन्दाकिनी	—

Every word from Proto-Indo-European *tréyes →Every word from Proto-Indo-Iranian tráyas →Every word from Proto-Indo-Aryan tráyas →