The name Arrius is a boy's name . Arrius and is often added to lists like Ancient Roman Names for Boys and discussed in our forums with posts like "Love, Like, Lose -- Outlandish/Guilty Pleasures edition!".
From the experts:
Arrius appears in the fourteenth century writings of Geoffrey Chaucer, but this name is even older. Arrius was a Roman general, and he appears briefly in Starz original series Spartacus. With names like Maximus and Julius in favor, Arrius fits right in.