All around the world, Iseu (Iseu 
) is a rare unisex first name. The given name Iseu is habitual in Indonesia, where it is a rare largely female, but uncommonly masculine name, and Brazil, where it is a very rare masculine name. Likewise, Iseu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Iseu | Brazil, Nigeria, Indonesia, Kenya, South Africa |
| iseu de santo elias affonso da costa Brazilian physician (1926-2010), BR (b. 1926) |
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| iseu da silva nunes researcher (ORCID 0000-0002-2818-3107) |
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