Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. ŏfella, ae, f. dim. [offa], a bite, bit, mouthful, morsel (post-Aug.).
2. Ofella, ae, m., a Roman surname: Q. Lucretius Ofella, Cic. Brut. 48, 178; Liv. Ep. 86; 88; Vell. 2, 27, 5.