Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ălyattes, is or ĕi, m., = Ἀλυάττης, a king of Lydia, father of Crœsus, Plin. 2, 12, 19, § 53: regnum Alyattei, * Hor. C. 3, 16, 41.