Savier and Saviero are practically unique, Sevier, which would seem unique, is Florentine, Sevieri has a strain in the Tuscan area between Lucchese and Pisano and one in Perugia, Sovier has a
Sovier and Soviera, practically unique, are of the Neapolitan, Sovieri, absolutely rare, it is of the area between Aretino and Perugino, Soviero is specific of the Neapolitan, of Striano and Visciano in particular, and of San Giuseppe Vesuviano, could derive from An italianization of the surname French Souvier, or even the medieval name Soverius, a variant of the most common Saverius.
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