Family name Cyliacus (Cyliacus 
) , globally, is a rare last name. The family name Cyliacus is habitual in Sub-Saharan Africa, particularly Tanzania, where it is a rare surname, and Nigeria, where it is an extremely rare surname. Also, Cyliacus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cyliacus | Nigeria, Tanzania |