Mucciaccia, absolutely rare, is from Molise, Mucciaccio is specific of Colletorto and Santa Croce of Magliano in the Campobasso area, Muciacci, practically unique, is probably due to a mistaken transcription of Muciaccia, which is typical of the Bari area, of Trani in particular and of Bari , Muciacia and Muciacca are unique and should also be due to a wrong transcription, they could derive from a modification of the Latin nomen Mucius, or of the Latin cognomen Mucianus, but it could also be a dialectal form for boccaccia perhaps to characterize the behavior or appearance of the progenitor, we mention, although really unlikely, a possible derivation from alterations of the Turkish name Mücahit. additions provided by Aldo Piglia There is another possibility, namely the derivation of Muciaccia from the Spanish word muchacho / a meaning boy / girl. In this case it would be a matronymic, born at the time of the Spanish domination of southern Italy with the Kingdom of Naples. An Internet check allowed us to verify the actual existence of surnames like Muchacho still today in Spain. The surname Muciaccia is currently widespread in four provinces: 44% Bari, 21% Milan, 9% Rome, 6% Foggia. The remaining 20% is fragmented in 27 different Italian provinces. Four other surnames are recorded which are very probably due to errors in registry transcription and more than rare are unique, namely Muciacca, Muciacci, Muciaccio and Muciacia. The surname Muciacito, also unique, belongs to the same lineage, but is a variant derived from the Spanish diminutive muchachito (= child, boy).
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