Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nĕrĭus, a, name of a Roman gens. So Cn. Nerius, Cic. Q. Fr. 2, 3, 5.
Perh. the same, celebrated as a usurer, Hor. S. 2, 3, 69; v. Wüstem. ad loc.