Family name Gesario (Gesario 
) , globally, is a very rare cognomen. The surname Gesario is habitual in Italy, where it is a very rare surname, Argentina, and the United States, where it is an extremely rare surname. Much less frequently, Gesario is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gesario | Argentina, Brazil, United States, Italy |