Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Astraeus, i, m., = Ἀστραῖος, a Titan, husband of Aurora, and father of the winds, which are hence called Astraei fratres, Ov. M. 14, 545; cf. Caes. German. Arat. 105, Hes. Theog. 378 sq.