Where does “fibla” come from?

fibla (Vulgar Latin) comes from Latin fibula, from Latin -āris, from Latin -ālis, from Proto-Italic -ālis.

Ancestry of “fibla”, step by step

Step	Language	Word	Meaning
1	Latin	fibula	clasp, buckle, brooch
2	Latin	-āris	—
3	Latin	-ālis	—
4	Proto-Italic	-ālis	—

fibla — Etymology, Origin & Word History | Etymology Explorer