All There in the Manual: The individual names of the Lords are never given onscreen and can be found in supplemental materials. In fact, they're never even referred to as Lords, but rather as The Unknown.
Canis Latinicus: The naming pattern for the Lords, save for the El. Each name consists of two Latin words: genus + descriptor. Example: Pantheras Luteus = Leopard/Panther Saffron Yellow. Though, as to be expected, some translations can get blurred.
Even Evil Has Standards: They're specifically to target humans blessed with the seed of Agito (those whom have supernatural abilities). Killing normal humans (unless said human had committed murder) is a taboo and the penalty is forced suicide. The Ant Lords somehow bypass this rule.