Throughout the world, Mösyö (Monsieur 
, Mösyö 
) is a rare male first name. The forename Mösyö is habitual in France, where it is a very rare male name, Indonesia, and the United States, where it is an extremely rare largely male, but infrequently female name. Likewise, Mösyö is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Monsieur | Senegal, Belgium, Cameroon, Ivory Coast, France |
| Mösyö | Turkey |
Mösyö is also a prevalent name for the fictitious and mythical characters: Monsieur Pierre Aronnax , the character created by Jules Verne, 20,000 Leagues Under the Sea; Monsieur D'Arque , the character from Disney's Beauty and the Beast; Monsieur Alfonse , the character in 'Allo 'Allo!; Monsieur Hulot , the fictional human, Les Vacances de Monsieur Hulot and Monsieur Olaf , the fictional Teenage Mutant Ninja Turtles character, Beware the Lotus, and in many other works.