Surname Halmu (Halmu 
) , globally, is a very rare family name. The family name Halmu is habitual in Finland, where it is a rare surname, the United States, where it is an extremely rare surname, and India. Much less frequently, Halmu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Halmu | India, United States, Finland, Philippines |