Where does “เฮเลนา” come from?

เฮเลนา (Thai) comes from English Helena, from Latin Helena, from Ancient Greek ἑλένη, from Proto-Indo-European swel- — to smolder; burn; scorch; beam, board, frame,...

Ancestry of “เฮเลนา”, step by step

Step	Language	Word	Meaning
1	English	Helena	—
2	Latin	Helena	Helen
3	Ancient Greek	ἑλένη	torch, firebrand; corposant, St. Elmo's fire;...
4	Proto-Indo-European	swel-	to smolder; burn; scorch; beam, board, frame,...

Every word from Proto-Indo-European swel- →Every word from Ancient Greek ἑλένη →Every word from Latin Helena →