(Ἀχιρόη), or according to Apollodorus (2.1.4) Anchinoe, which is perhaps a mistake for Anchiroe, was a daughter of Nilus, and the wife of Belus, by whom she became the mother of Aegyptus and Danaus. According to the scholiast on Lycophron (583 and 1161), Ares begot by her a son, Sithon, and according to Hegesippus (apud Steph. Byz. s. v. Παλλήνη), also two daughters, Pallenaea and Rhoetea, from whom two towns derived their names.
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890