MAMILLA, although a most noble and most ancient family, emigrating, it is said, from Tusculum, or from Tibur, yet it became plebeian at Rome. It derived it surname Limetanus, it is believed, from its being given at first to C. Mamilius, tribune of the people, because he (v.c. 589) carried the lex de limitibus or boundary law. In its coins which are for the most part common, there are eighteen varieties; the silver pieces restored by Trajan are extremely rare, amongst these is the following interesting type: -