Calef, extremely rare, is present sporadically in the Umbrian, Marche, with a small stock in Senigallia, Caleffa, absolutely rare, is specific to the Vicenza area, Caleffi is widespread in the area that includes Verona, Mantua and Parma. the Reggio, Modena, Bologna and Ferrara dialects, Caleffo, almost unique, would appear to be from the Veronese area, could derive from the Hebrew name Caleb or even from an alteration of Haleb, the current Aleppo in Syria, probable place of origin of families. additions provided by Giovanni Vezzelli The surname Caleffi is of supernominal origin and stems from the ancient Italian calèffo «burla» and from caleffare «joke». The personal name Calleffus is present in a Modenese paper of 1163. Source: F. Violi, Surnames in Modena and in the Modena area.
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