Are Elephants Related To Hippos?

Are Elephants Related To Hippos? Elephants are sometimes called pachyderms, a term that also applies to rhinos and hippos, and refers to their thick skin. These other pachyderms are not closely related to the elephants, however. Rhinos are perissodactyls, related to horses, and hippos are artiodactyls, related to pigs and camels. What is the closest