The transmitted headword dhnadi/ptra appears likewise, with this same gloss, in ps.-Zonaras. It is otherwise unattested, and almost certainly corrupt: Adler cites as a previous source the unedited Lexicon codicis Barocci 50, where the lemma is dwna/tiba, a more straightforward transliteration of the Latin donativa.
For references to other entries of this sort, see epsilon 832.