Pairetti, very rare, is from Turin, Pairetto, almost unique, is from Turin, Peiretti is typical of Turin and Turin, Carignano, Collegno, Osasio, Rivalta di Torino and None, Peyretti, very rare, it is typical of Turin, Turin and Collegno, and is probably an archaic form of the previous one, they should all derive from hypocoristic forms of the name Franco Pair, we remember with this name the Holy Pair bishop of Avrances in Gaul in the sixth century, but it is also possible a derivation from the name Payret, a Provencal hypocoristic form of the name Pierre (Pietro).
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