dégun

from Latin nec unus via Vulgar Latin *negusFranco-Provençal dictionary, S. J. Honnorat, 1846, the Roman degunLexique Roman or Dictionary of the Language of the Troubadours Compared with the Other Languages of Latin Europe, M. Reynouard, 1838, p. lvij, then Occitan degunÉva Buchi, Borrowings in the Dictionary of French Regionalisms (offprint). The Latin etymon gives ninguno in Spanish, nessuno in Italian, ningú in Catalan, ninguém in Portuguese, etc. The change from /n-/ to /d-/ occurs by dissimilation in Occitan, in Leonese, and is observed in Old SpanishG. Rohlfs, Le Gascon. Studies in Pyrenean Philology, Tübingen, Max Niemeyer Verlag. probably under the influence of prepositions or negations nen nengun, sin nengun Å. W. Munthe, Miscellaneous Spanish Contributions, in Zeitschrift für Romanische Philologie, 15 (1891), p. 228-232.