Illyria state included a few tribes placed in the south of the western Balkans (Autariates were noted in some sources as formers of this state). All authors have mentioned it in their writings to avoid misunderstanding, since all of them were using "Illyrians" for all of these people. Literacy was not some part of Illyrian culture so our knowledge about them came from Greek and Roman inscriptions. Illyrians were a tribe (Illyroi, Ilyrii) in present-day Albania for early Greek writers, they were several tribes in the age of Illyria state for later Greek writers (Authariates, Taulanti,...), they were tens of tribes for Roman writers in the age of forming Illyricum province of the Roman Empire.
Stipčević mentioned around 70 different tribes in his "Iliri" book. This article uses the name in the same manner as the authors of the sources so... for Liburni, Delmatae, Iapodes, Histrii, Daesitiaes, Maezaei, Dindari, Oseriates, Deuri, Daorsi, Vardaei and so on... Actually they didn't call themselves "Illyrians", neither the habitants of Illyria did (there's no proof)! That's how Greeks and Romans call them and so do we at present.
the way it stands regarding the Illyrian-Albanian issue is too simplistic. It states that scholars think Albanians are descended from Illyrians, or if not, then Dacians. However, most scholars now - even certain Albanologists from Albania- plainly state, that in fact we do not know where they are from. There is more evidence against an Illyrian origin than for it. So this article would be better if it clarified that whilst some theorists that Albanians descended from Illyrians (if we forget the 1000 year gap between the two groups) , in reality we do not know where they are from (due to lack of any significant Albanian chronicles or state in the Balkans).
The main part of Illyrians was probably formed of autochtonuous I1b, Thracians of E3b, proto-Greeks of J2. It's possible that Dorian migration was actually migration of some proto-Illyrians to the south east where they were lately Helenised during Iron Age. It gives explanation why many authors find ancient Macedones as "perfect" admixture of Illyrians, Greeks and Thracians. In the same place there is perfect admixture of I1b, E3b and J2 even at present. Modern Albanians fall into the same gene pool. Language doesn't help too much here because it's very unstable component in ethnogenesis processes,
Since albanian is most E then thracian seems the origin of albanians