Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Phălantus, i, m., = Φάλαντος, a Spartan who emigrated to Italy and there founded Tarentum: et regnata petam Laconi Rura Phalanto, i.e. Tarentum, Hor. C. 2, 6, 11; Just. 3, 4, 7.
Hence,