Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Entella, ae, f., = Ἔντελλα, a city in the interior of Sicily, now Rocca d’ Entella, Sil. 14, 204.
Hence, Entellīni, ōrum, m., the inhabitants of Entella, Plin. 3, 8, 14, § 91.
In sing., Entellinus, Cic. Verr. 2, 3, 87.
And adj.: Entellinus senatus, id. ib.