Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. căpĭto, ōnis, m. amplif. [caput], one that has a large head, big-headed.
2. Căpĭto, ōnis, m., a Roman cognomen, Atteius Capito; v. Atteius.; esp. in the gens Sestia; v. Fast. Capitol. ap. Grut. 289; and sarcastically, a name given to parasites, Plaut. Pers. 1, 2, 8; v. the commentt. ad h. l.