Lewis & Short

2. Căpĭtŭlum, i, n., a town of the Hernici in Latium, now perh. Paliano, Plin. 3, 5, 9, § 63.
Hence, Căpĭtŭlen-ses, ĭum, m., the inhabitants of Capitulum, Dig. 50, 15, 8, § 7.