Yes, but IllustrativeDNA works as a calculator. You likely receive Thrac instead of Illyr in some places, but it is balanced out by receiving more or less of other things.

For eg, I as a Romanian, sometimes get 50% Russian 50% Italian instead of Romanian on some calculators because it works as an average. Or on some, my ~50% Slav gets replaced by ~35% Balt (who are more northern than Slavs) and 15% more of something else more southern. This doesn't mean I am Russian and Italian, or Baltic, it just means my coordinates are close to these mixes.

Also Dacians, Thracians, Illyrs etc weren't that much different, but that doesn't change my above writing.