Aiassa is typical of Turin, of Turin, Carmagnola, Vigone, Chiero and Moriondo Torinese, Ayasse, also Piedmontese, it would seem unique, as well as Ayassa, should derive from the French surname Ayasse which would seem to be born from the Latin term acastus (maple), probably to indicate a characteristic of the place of origin of the forefathers, according to another hypothesis derives instead from the Basque term aitz (rock), considering the discrete diffusion of Waldensians of Basque origin in the Asti area. additions provided by Daniele Zaia Surname of north-west of the Province of Asti. I suggest a derivation from the toponmo Val d'Ayas in Valle d'Aosta
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