Family name イソ (Iso 
, イソ ) , globally, is quite a common last name. The cognomen イソ is habitual in North Macedonia, where it is quite a common surname, Philippines, where it is quite a rare surname, and Algeria, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Philippines, Nigeria, and Indonesia. Likewise, イソ is the forename as well as the last name.