V is the name of the manufacturer Vintage/"Qualitest" Pharmaceuticals. Vintage was the name of the company that was purchased with Qualitest Pharmaceuticals by an investment group called Apax. The combined pharmaceutical company is now only called Qualitest due to the very bad press and legal troubles that Vintage got into, but the tabs still carry the V branding.
Some of the major manufacturers of hydrocodone meds are Watson, UAD Laboratories Inc, Mallinckrodt Pharmaceuticals, Abott Labs, UCB.
Other names of drugs with hydrocodone? Norco, Vocodin, Hydrocet, Lortab, Lorcet, Norco, Maxidone, Co-Gesic, Xodol, Zydone, Anexsia, and several others as it depends upon the amount of hydrocodone and acetaminophen. The pill that you have has 10 milligrams of the narcotic (hydrocodone) and 325 milligrams of Tylenol. The Norco brand has this formulation and you likely have the generic.
See my source link for some additional info on hydrocodone. ~J~