Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
por, for puer, i. e. servus; e. g. Marcipor, Lucipor, etc., i. e. servus Marci, etc., Prisc. 6.
Thus also pora for puera, i. e. serva, Inscr. Rein. Class. 17, n. 180.