Where does “Loxia” come from?

Loxia (Translingual) comes from Ancient Greek λοξός, from Proto-Indo-European lewg- — to bend.

Ancestry of “Loxia”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	λοξός	Not straight: slanting, crosswise, oblique; To...
2	Proto-Indo-European	lewg-	to bend

Loxia — Etymology, Origin & Word History | Etymology Explorer