Cognomen Randriamialy (Randriamialy 
) , in the world, is a rare surname. The cognomen Randriamialy is characteristic of Madagascar, where it is quite a rare surname, France, where it is a very rare surname, and Chile, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Randriamialy | Chile, France, Madagascar |