Last name Dacys (Dacys 
) , in the world, is a very rare family name. The family name Dacys is habitual in Northern Europe, particularly Lithuania, where it is quite a rare surname, Latvia, where it is a rare surname, and Estonia. Not in comparison with a country's population, it is commonest in Lithuania, Romania, and Latvia. Very seldom, Dacys is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dacys | Norway, Latvia, Lithuania, Estonia, Romania |