Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. Aegeus (dissyl.), ĕi, m., = Αἰγεύς, son of Pand on, king of Athens, and father of Theseus, Hyg. Fab. 37, 41; Serv. ad Verg. A. 3, 74; Ov. M. 7, 402 sq.; id. F. 2, 41 al.
2. Aegēus, a, um (trisyl.), adj., i. q. Aegaeus.