Surname Masidayu (Masidayu 
) , worldwide, is an extremely rare family name. The last name Masidayu is habitual in South-eastern Asia, particularly Malaysia, where it is an extremely rare surname. Much more prevalently, Masidayu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masidayu | Singapore, Malaysia |