Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Dēĭphŏbus, i, m., Δηΐφοβος, son of Priam and Hecuba, and husband of Helen after the death of Paris, Verg. A. 2, 310; 6, 495 sq.; Ov. M. 12, 547; Prop. 3(4), 1, 29.