I.a Titan, son of Uranos and Gœa, the father of Atlas, Prometheus, and Epimetheus, Hyg. F. praef.; 54; 142; 144; Verg. G. 1, 279; Lact. 2, 10, 7 sq.: “satus Iapeto,” i. e. Prometheus, Ov. M. 1, 82; “called also Iapeti genus,” Hor. C. 1, 3, 27.—
II. Deriv. Īăpĕtīŏnĭdes , ae, m., a male descendant of Iapetus: “Atlas,” Ov. M. 4, 632: “fratres gemini,” i. e. Prometheus and Epimetneus, Claud. Eutr. 2, 49.