Anatom (more commonly spelled Aneityum, and sometimes also Kéamu) is the southernmost island of Vanuatu. It is in the province of Tafea. The largest village is Anelghowhat (correctly, Anelcauhat), on the south side. The island is 159.2 km² in size. It rises to an elevation of 852 meters in Mount Inrerow Atamein.