Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Lacetāni, ōrum, m., a people of Hispania Tarraconensis, Liv. 21, 60; 28, 34; Plin. 3, 3, 4, § 34.
Hence, Lacetānia, ae f., the country of the Lacetani, Liv. 21, 23; Sall. Ep. Pomp. 5; Plin. 25, 2, 6, § 17.