Caldan is almost unique, Caldana is typical of the area that includes Brescia, Verona and Vicenza, Caldani has a small stock in the Imperia area, one in Florence and one in Rome, Caldano, extremely rare, has a small stock between Piedmont and Liguria. one perhaps in the Potentino, they should derive from the many toponyms containing the root Caldan-, such as Caldana in the Varese area, in the Grosseto area and in the Siena area, Caldane in the Potentino area or other similar ones, but could also derive from nicknames originating from the archaic term caldana or caldano ( heated room) with this name was called the place where the bakers put the bread to leaven, caldano was also called the vessel used to heat, often made of copper, where the embers were still burning.
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