Erriapus or Saturn XXVIII, is non-spherical moon of Saturn. It was found by Brett Gladman, John J. Kavelaars, et al. in 2000, and given the designation S/2000 S 10. It was named in August 2003 after Erriapo, a giant in Gaulish mythology. Later, the spelling was corrected to Erriapus.
Erriapus is about 10 kilometres in diameter, and orbits Saturn at an average distance of 17,300,000 km in 871 days.