Stefano Guazzo (1530–1593), Italian writer from Casale Monferrato
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Francesco Maria Guazzo (c. 1570–c. 1630), teacher of theology and author of the witch-finders’ manual Compendium Maleficarum
However, in 1441 Pope Eugene IV merged them into one congregation called ‘Congregatio Sancti Ambrosii ad Nemus’ of which Francesco Maria Guazzo was a member under the papacy of Pope Sixtus V and Pope Paul V.