Ardisson, absolutely rare, and Ardissoni, almost unique, seemed Piedmontese, Ardissone has a Piedmontese nucleus between Turin, Borgofranco d`Ivrea (TO) and Castellamonte (TO), and a nucleus between Diano San Pietro, Diano Marina and Diano Castello in imperiese, Ardizzon is specific to Chioggia (VE), Ardizzone, quite widespread, has an important stock in north-eastern Sicily, and a strain between Piedmont and Lombardy, Ardizzoni is typical of the Ferrara area, Arduzzoni, extremely rare, is specific to the Reggio area , from Parma, all derive, directly or through dialectal modifications, from the oblique shape of the Italogermanic name Arditio (Arditionis). We find traces of this name in a deed of transfer of land ownership of the 12th century preserved in Milan: "... Primus campus dicitur Sute Curte, coheret ei a mane via, in Ardenzeis, a sero Ugonis de Citilli, and east for mensuram iustam tabule treginta et sex Secundus campus est ibi prope, a mane via et terra Otonis, meridie Bollagii, a sero Straciadi, et est tabule decem et dimidia Tertius campus dicitur in Cagalli, mane Ugonis de Citilli, meridie via , a sero Ardizionis, a monte via, et est tabule decem et octo. ". additions provided by Giovanni Vezzelli Ardizzoni starts from the medieval personal name Ardicionus, of Germanic origin (from * hardhu - "strong, valiant"), like Ardissone.
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