LSJΠοσοιδαίαGlossΠοσοιδαία , ἡ , name of a tribe at Mantinea, IG 5(2).271.14 (iv B. C.) .Ποσοιδαία,ἡ, name of a tribe at Mantinea, IG 5(2).271.14(iv B. C.).