They’re all Ancient Greek, really, and they’re all Greek star names from Nick Nicholas’ answer to What are all the Greek star names?
- α Virginis: Stachys is “Ear of Wheat”. It’s Aratus’ name, and the established name Spica is its Latin translation.
- ζ Hydrae: Hydrobius (whatever the name’s provenance) is “living in water” (or in Hydra, I guess)
- β Herculis: Kornephoros is supposed to be “club bearer”. The ancient Greek is in fact korynēphoros; mangling of Ancient Greek appears to be routine in my list. Its alternative name, Rutilicus, is also “a corruption of the Latin word titillicus, meaning ‘armpit’.” (Beta Herculis – Wikipedia)
- ε Virginis: Protrygater is “fore-harvester” (referring to the wine harvest). Again, this is Aratus’ name and the established name, Latin Vindemiatrix meaning ‘the grape-harvestress’, is derived from it.