Last name Исаеу (Isaeu 
, Исаеу 
) , globally, is a very rare family name. The surname Исаеу is characteristic of Lithuania, where it is a rare surname, and Russia, where it is a very rare surname. Much less frequently, Исаеу is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isaeu | Brazil, Lithuania |
| Исаеу | Russia |