Origin of surname "Buonarroti"?
Yes, it's the surname of Italian Renaissance sculpture/painter "Michelangelo di Lodovico Buonarroti Simoni".
I found Michelangelo means "Michael-Angel" and Lodovico is his father's name, Simoni is a regional name.
Then, could you show me origin of "Buonaritti"?
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Replies

Hanks & Hodges's A Dictionary of Surnames says that Buonarroti is from the medieval Tuscan given name Buonarroto, which was itself made up of the elements buona "good" and arrota "gain, increase". The first name Buonarroto was originally given to a child who was a welcome addition to the family and so provided a "good increase" to the number of children.
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