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Family name Isaku (Isaku
, Исаку) , all around the world, is quite a rare last name. The cognomen Isaku is habitual in Albania, where it is quite a common surname, Kosovo, and North Macedonia, where it is quite a rare surname. In absolute terms, the name is most common in Japan, Albania, and Nigeria. Also, Isaku is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isaku | Kosovo, India, Japan, Nigeria, Albania |