Leto is a typical surname of Sicily and of Crotone, with a stock also in the Neapolitan, it could derive from the contraction of the toponym Letojanni (ME), but much more probably it should derive from the Latin name Laetus (pronounced Letus and means happy, happy), of which we have an example in this text of the Roman imperial epoch: "... Tunc Pertinax interficiendi Commodi conscientiam delatam sibi ab aliis non fugit. Commodus autem interempto Laetus praef (ectus) praet (orius) et Eclectus cubicularius ad eum venerunt ... ". additions provided by Stefano Ferrazzi A surname prevalent mainly in Sicily, with a major nucleus in the Palermo area, although a minor lineage is also found in Calabria, in the Crotone area, derives from the name Leto, formed from the Latin laetus, meaning happy.
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