Family name Maithu (Maithu 
) , worldwide, is a rare cognomen. The family name Maithu is characteristic of Kenya, where it is a rare surname, India, where it is a very rare surname, and Malaysia. Not in comparison with a country's population, this name is the most popular in India, Kenya, and Vietnam. Likewise, Maithu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Maithu | Vietnam, Kenya, India, Malaysia, United States |