Attalis

Attalis was a tribe added by the ancient Athenians to the previous list of 11 Athenian tribes in the spring of 200 B.C. just a few months after the "Macedonian" tribes Antigonis and Demetrias were dissolved. The tribe was named after Attalos I, King of Pergamon, on occasion of his visit to Athens.
The Monument of the Eponymous Heroes had two statues removed and one, for Attalos, added, starting the so-called Period IV.
The Athenians placed the on the 12th and last place of their list, but modern researchers use the Roman numeral XIV to designate Attalis.
The 12 demes that formed Attalis were collected from all 11 existing tribes, with the twelfth, Apollonieis, newly created and named after Apollonis of Cyzicus, wife of Attalos I.