Where does “Crotalinae” come from?

Crotalinae (Translingual) comes from Translingual Crotalus, from Latin crotalum, from Ancient Greek κρόταλον, from Ancient Greek κροτέω — to rattle.

Ancestry of “Crotalinae”, step by step

Step	Language	Word	Meaning
1	Translingual	Crotalus	—
2	Latin	crotalum	castanet
3	Ancient Greek	κρόταλον	clapper, rattle, castanet
4	Ancient Greek	κροτέω	to rattle

Crotalinae — Etymology, Origin & Word History | Etymology Explorer