Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Hippŏmĕnes, ae, m., = Ἱππομένης, son of Megareus, who conquered Atalanta, the daughter of Schœneus, in a race, and thus obtained her as his wife, Ov. M. 10, 575 sq.; 632; Hyg. Fab. 185; Serv. Verg. A. 3, 113.