Mnaseas and his son Mnason are two interesting but also quite obscure personalities
of the Third Sacred War in Phokis. Judging from the limited evidence provided by the
ancient writers, we could suppose that the conflict between Mnaseas and Euthykrates,
Onomarchos' father, was actually the cause of Philomelos' ascending into power, the person who led Phokians to the seizure of Delphi and to the squandering of the sanctuary's money, an act that essentially marked the beginning of the war. As far as Mnason is concerned, he probably belonged to the moderate party of the Phokians, who acted against the will of the stratēgoi autokratores who in time developed pro-Macedonian feelings. Obviously, with the support of the victorious Macedonians, he managed to build up an important fortune and possibly to exercise tyrannical rule in Elateia.