Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Pandae, ārum, m., a people of India: gens sola Indorum regnata feminis, Plin. 6, 20, 23, § 76.
Hence, Pandaeus, a, um, adj., of the Pandœ: gens, Sol. 52.