Where does “สุมิตรา” come from?

สุมิตรา (Thai) comes from Sanskrit सुमित्रा, from Sanskrit सु-, from Proto-Indo-Aryan Hsu-, from Proto-Indo-Iranian Hsu-, from Proto-Indo-European h₁su-, from Proto-Indo-European h₁wes- — good; to be cheerful, happy; to eat, to feast.

สุมิตรา (Thai): amicable person

Definitions

amicable person

Ancestry of “สุมิตรา”, step by step

Step	Language	Word	Meaning
1	Sanskrit	सुमित्रा	good friend
2	Sanskrit	सु-	good, well
3	Proto-Indo-Aryan	Hsu-	—
4	Proto-Indo-Iranian	Hsu-	good
5	Proto-Indo-European	h₁su-	good
6	Proto-Indo-European	h₁wes-	good; to be cheerful, happy; to eat, to feast

Every word from Proto-Indo-European h₁wes- →Every word from Proto-Indo-European h₁su- →Every word from Sanskrit सु- →