Zoia has a Venetian lineage and one in central-western Lombardy, Zoja would seem a Milanese form of the same surname, they could both derive from a dialectal modification of the name Gioia or from a nickname always originated from the word joy in dialectal form, as we have for example in an act of 1643 in Bergamo written by the notary "Pietro Maria Merisius called Zoia fu Bernardino", traces of this surname we find in Valtellina since 1600.
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