Where does “seraphim” come from?

seraphim (Latin) comes from Koine Greek σεραφείμ, from Hebrew שְׂרָפִים, from Hebrew שָׂרָף — venomous snake; seraph.

Ancestry of “seraphim”, step by step

Step	Language	Word	Meaning
1	Koine Greek	σεραφείμ	—
2	Hebrew	שְׂרָפִים	—
3	Hebrew	שָׂרָף	venomous snake; seraph