Derived (and debased: see next note) from Harpokration s.v. That entry is generated by the appearance of the headword in Demosthenes (= Apollodorus) 45.80: its mention, as one of the places in Athens↗ where slaves were sold, harks back to Phormio's servile origins.
1So the transmitted gloss, o)/ros, but Harpok. shows that it should be a)na/ktoron, "a shrine".↩
2On the Dioscuri or Anakes ("Lords"), i.e. Castor and Pollux, see generally OCD(4) s.v. (p.466), and delta 1209.