(Ἀγυιεύς), a surname of Apollo describing him as the protector of the streets and public places. As such he was worshipped at Acharnae (Paus. 1.31.3), Mycenae (2.19.7), and at Tegea. (8.53.1.) The origin of the worship of Apollo Agyieus in the last of these places is related by Pausanias. (Compare Hor. Carm. 4.6.28; Macr. 1.9.)
[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