- Hippo, Hippo Regius - an ancient Numidian town in northwestern Africa adjoining present-day Annaba in northeastern Algeria
--1 is a kind of town
--1 is a part of Algeria, Algerie, Democratic and Popular Republic of Algeria - hippopotamus, hippo, river horse, Hippopotamus amphibius - massive thick-skinned herbivorous animal living in or around rivers of tropical Africa
--2 is a kind of even-toed ungulate, artiodactyl, artiodactyl mammal
--2 is a member of genus Hippopotamus