Cognomen Ileneo (Ileneo 
) , in all the world, is a very rare last name. The cognomen Ileneo is habitual in Sub-Saharan Africa, particularly Tanzania, where it is a very rare surname. Very seldom, Ileneo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ileneo | New Zealand, Philippines, Tanzania |