Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nestŏrĭus, ii, m., a theologian who was condemned as a heretic at the Council of Ephesus.
Hence, Nestŏrĭāni, ōrum, m., the followers of Nestorius, the Nestorians, Cod. 1, 5, 8; 16, 5, 66.