Cognomen Monsoy (Monsoy 
) , throughout the world, is a very rare last name. The cognomen Monsoy is habitual in Philippines, where it is a very rare surname, Norway, and Israel. In absolute terms, it is the most numerous in Philippines, Norway, and Mexico. Very seldom, Monsoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Monsoy | Norway, Philippines, Mexico, India, Israel |