Where does “barbel” come from?

Barbel comes from Old French barbel, a diminutive of Old French barbe, from Latin barba meaning beard, ultimately from Proto-Indo-European bʰardʰeh₂.

barbel (English): A freshwater fish of the genus "Barbus" or other...

Definitions

Step	Language	Word	Meaning
1	Old French	barbel	barb; barbel
2	Vulgar Latin	barbellus	—
3	Classical Latin	barbulus	—
4	Latin	barbus	barbel
5	Latin	barba	beard; wool, down on a plant; Alternative form of...
6	Latin	farba	—
7	Proto-Italic	farβā	beard
8	Proto-Indo-European	bʰardʰéh₂	beard