|The Carpi or Carpians were a Dacian tribe that were originally located on the Eastern slopes of the Carpathian Mountains, in what is now Bacău county, Romania.|
Their name (Carpi) seems to be connected to the place where they lived, meaning "rock" or "mountain" (cf. Albanian karpë='rock', from IE *ker/sker).
Thus the name of the Carpathian mountains is probably either derived from their name, or vice versa. Ptolemy first mentions the Carpates (Karpates) mountain range corresponding to the Western Carpathian mountain range.
While most Dacian tribes (such as the Costoboci) were defeated by the Roman Empire, the Carpians increased their power in the 2nd century AD, becoming (until the barbarian invasions) the most important adversaries of the Roman empire in South-Eastern Europe.
Between 238 - 273, allied with the Goths, the Carpians raided the Roman province of Moesia. Becoming a nuisance for the Roman Empire, Diocletian fought them and took the title of "Carpicus Maximus" for defeating them in 297. According to Roman historian Ammianus Marcellinus (Liber XXVIII 1.5 ), they were moved by Diocletian to Pannonia.
Sextus Aurelius Victor confirms this, but adds that it was the entire Carpian nation that was moved (De Caesaribus, 39:43 ) This appears to be confirmed by later attacks against the Byzantine Empire from outside the empire.
Zosimus mentioned them in the 5th century, using the name of Carpo-Dacians (possibly to distinguish them from the Carpians living in the Roman territory), as being defeated at the Danube by the Byzantine Emperor Theodosius I in late 4th century. This was the last chronicle in which the Carpians appear.
Their fate is not known, but it has been suggested that they eventually migrated southward and that they could be the ancestors of Albanians.