Barinthus

Barinthus can refer to:
 * Manannan Mac Lir, sea and weather god from Irish mythology
 * Barvitus, supposed saint
 * Barinthus, a character in the "Merry Gentry" series of books by Laurell K. Hamilton
 * Vaccitech, a biotech company that renamed to Barinthus Biotherapeutics in 2023