Cognomen Santoianni (Santoianni 
) , globally, is quite a rare surname. The family name Santoianni is habitual in Italy, where it is a rare surname, Argentina, and Canada. Measured by absolute frequency, it is the most numerous in Italy, Argentina, and the United States. Very seldom, Santoianni is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Santoianni | Italy, United States, Argentina, Canada, Brazil |
| matÃas santoianni Argentinian actor, AR (b. 1973) |
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