Given name
* Constanzo Beschi (1860–1747), Italian jesuit priest, missionary, and Tamil language littérateur * Constanzo Festa (c. 1485/1490–1545), Italian composer * Constanzo Mangini (1918–1981), Italian ice hockey playerSurname
* Adolfo Constanzo (1962–1989), American serial killer, drug trafficker, and cult leader *Carmine Constanzo (died 1997), actor and father ofSee also
* Costanzo {{Given name, type=both Given names Surnames Italian-language surnames Italian masculine given names Masculine given names