Family name Катилюс (Katilius 
, Катилюс 
) , around the globe, is a rare last name. The last name Катилюс is habitual in Northern Europe, particularly Lithuania, where it is quite a common surname, Latvia, where it is a rare surname, and Ireland. In absolute terms, it is the most numerous in Lithuania, the United States, and Russia. Much less frequently, Катилюс is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Katilius | Australia, Ireland, United States, Poland, Lithuania |
| Катилюс | Russia, Ukraine, Belarus |
|
катилюс, рамунас Lithuanian physicist (1935-2014), LT (b. 1935) |
|
| катилюс, раймондас Lithuanian violinist and university teacher (1947-2000), LT (b. 1947) |
|