Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Statielli (Statelli), ōrum, m., a people of Liguria, Plin. 3, 5, 7, § 47; Liv. 42, 21.
Their chief town was called Aquae Statiellorum, Plin. l. l.; or Statĭellae, ārum, f., id. 31, 2, 2, § 4.
Hence,