Lewis & Short

Rūsellae (Rōsell-), ārum, f., a town of Etruria, now Rosello.
Hence, Rūsel-lānus (Rōsell-), a, um, adj., of or belonging to Rusellœ: ager, Liv. 10, 4; 37: colonia, Plin. 3, 5, 8, § 51.
Subst.: Rūsel-lāni, ōrum, m., the inhabitants of Rusellœ, Liv. 28, 45 fin.