Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Bato, ōnis, m., a leader of insurrection in Dalmatia, Ov. P. 2, 1, 46; cf.: maxima duobus Batonibus ducibus auctoritas erat, Vell. 2, 110, 4; 2, 114, 4.