Yes Sile, Free Dacian and probably some tribes considered as Dacian were different by ethnicity, not ethnic Dacian
Latin language introduced by Romans relatively quickly engulfed areas of Illyricum, Moesia and Dacia, romanization was permanent and successful.
It was very useful not only because of Roman power, but also because people who speak different languages got chance that socialize, communicate, cooperate, act, trade together.
There is list Free Dacian and Dacian tribes, and it is possible this list is not completed, it would be important for every tribe to we know ethnicity:
- Aedi
- Albocense - lived west of the Potulatenses
- Anarti - lived in the north west
- Apuli - lived in central Transylvania with their capital at Apulum (Piatra Craivii)
- Biessoi
- Biephi - lived west of the Buridavenses
- Buridavenses - lived in northern Moldavia with their citadel Buridava
- Calipizi - lived between the Dnestr and the Bug rivers
- Carpi - lived east of the Carpathians and west of the Dnestr river. The name of the Carpathian Mountains probably comes from the name of this tribe
- Caucoenses - lived to the east
- Ciagisi - between the Saldenses and Piephigi
- Clariae
- Costoboci - lived in northern and north-eastern Dacia, reaching the territory of modern Ukraine and Moldavia
- Cotenses - live east of the Buridavenses
- Crobobizi and the Trizi - lived in Dobrogea
- Getae
- Keiasigi - lived in Transylvania
- Napae
- Osi
- Peucini
- Piephigi - lived in Moldavia and eastern Muntenia
- Potulatenses - between the Albocenses and Sienses
- Predavenses - lived in the west
- Ratacenses - between the Predavenses and the Caucoenses
- Sabokoi
- Saldenses - lived in the Banat and Crisana
- Saugdae
- Sienses - lived east of the Potulatenses
- Suci - lived in Oltenia with their citadel Sucidava at the mouth of the river Olt
- Teurisci - lived in the north
- Trixae
- Tyragetae - lived at the mouth of the river Dnestr
- Troglodytae.
Ptolomy Dacia