Fifty years before Kirk and company visit the planet Eminiar VII in the 2260s, the USS Valiant is destroyed. I guess with the USS Kelvin now canon, it can be conjectured that the USS Valiant, registry NCC-1223 according to the trek encyclopedia, was a ship of the same or of a similar class. It doesn’t necessary have a to be a single-nacelle sister-class ship either, just a ship of the same generation, like maybe the conjectured Baton Rouge or Ranger Class.
PS: Any vessel named valiant has gotta be the unluckiest ship in the trekenverse. Starfleet should retire the name after the Defiant-class Valiant was destroyed in DS9.
PS: Any vessel named valiant has gotta be the unluckiest ship in the trekenverse. Starfleet should retire the name after the Defiant-class Valiant was destroyed in DS9.