(Ὠμίας), a Lacedaemonian, was the chief of the ten commissioners who were sent to Philip V., king of Macedon, tlen at Tegea (B. C. 220), to give assurances of fidelity, and to represent the recent tumult at Sparta. in which the Ephor Adeimantus and others of the Macedonian party had been murdered, as having originated with Adeimantus himself. Philip, having heard Oenias and his colleagues, rejected the advice of some of his counsellors, to deal severely with Sparta, and sent Petraeus, one of his friends, to accompany the commissioners back, and to exhort the Lacedaemonians to abide steadfastly by their alliance with him. (Plb. 4.22_25.)