The Celts in the Iberian peninsula were traditionally thought of as living on the edge of the Celtic world of the La Tène culture that defined classical Iron Age Celts. Earlier migrations were Hallstatt in culture and later came La Tene influenced peoples. Celtic or (Indo-European) Pre-Celtic cultures and populations existed in great numbers and Iberia experienced one of the highest levels of Celtic settlement in all of Europe.
In the 3rd century BC, Gauls immigrated from Thrace into the highlands of central Anatolia (modern Turkey).These people, called Galatians, were eventually Hellenized, but retained many of their own traditions.
^John Boardman, I. E. S. Edwards, E. Sollberger, and N. G. L. Hammond, The Cambridge Ancient History, Vol. 3, Part 2: The Assyrian and Babylonian Empires and Other States of the Near East, from the Eighth to the Sixth Centuries BC, ISBN 0-521-22717-8, 1992, p. 600: "In the place of the vanished Treres and Tilataei we find the Serdi for whom there is no evidence before the first century BC. It has for long been supposed on convincing linguistic and archeological grounds that this tribe was of Celtic origin"
^Dio Cassius, Earnest Cary, and Herbert B. Foster, Dio Cassius: Roman History, Vol. IX, Books 71-80 (Loeb Classical Library, No. 177), 1927, Index: "... 9, 337, 353 Seras, philosopher, condemned to death, 8. 361 Serdi, Thracian tribe defeated by M. Crassus, 6. 73 Seretium,""
^J. J. Wilkes, The Illyrians, 1992, ISBN 0-631-19807-5, p. 140: "... Autariatae at the expense of the Triballi until, as Strabo remarks, they in their turn were overcome by the Celtic Scordisci in the early third century BC ..."
^Frank W. Walbank, Polybius, Rome and the Hellenistic World: Essays and Reflections, ISBN 0-521-81208-9, 2002, p. 116: "... in A7P 60 (1939) 452 8, is not Antigonus Doson but barbarians from the mainland (either Thracians or Gauls from Tylis) (cf. Rostovizef and Welles (1940) 207-8, Rostovizef (1941) 111, 1645), nor has that inscription anything to do with the Cavan expedition. On ..."
^Adrian Goldsworthy, How Rome Fell: Death of a Superpower, ISBN 0-300-13719-2, 2009, p. 105: "... who had moved to the Hungarian Plain. Another tribe, the Bastarnae, may or may not have been Germanic. ..."
^Christopher Webber and Angus McBride, The Thracians 700 BC-AD 46 (Men-at-Arms), ISBN 1-84176-329-2, 2001, p. 12: "... never got near the main body of Roman infantry. The Bastarnae (either Celts or Germans, and `the bravest nation on earth' - Livy ..."
^ abIoana A. Oltean, Dacia: Landscape, Colonization and Romanization, ISBN 0-415-41252-8, 2007, p. 47.
^ abIon Grumeza, Dacia: Land of Transylvania, Cornerstone of Ancient Eastern Europe, ISBN 0-7618-4465-1, 2009, p. 51: "In a short time the Dacians imposed their conditions on the Anerati, Boii, Eravisci, Pannoni, Scordisci,"
^A. Mocsy and S. Frere, Pannonia and Upper Moesia. A History of the Middle Danube Provinces of the Roman Empire. p. 14.
^Andrea Faber, Körpergräber des 1.-3. Jahrhunderts in der römischen Welt: internationales Kolloquium, Frankfurt am Main, 19.-20. November 2004, ISBN 3-88270-501-9, p. 144.
^Velika Dautova-Ruševljan and Miroslav Vujović, Rimska vojska u Sremu, 2006, p. 131: "extended as far as Ruma whence continued the territory of another community named after the Celtic tribe of Cornacates"
^Géza Alföldy, Noricum, Tome 3 of History of the Provinces of the Roman Empire, 1974, p. 69.
^Alan Bowman, Edward Champlin, and Andrew Lintott, The Cambridge Ancient History, Vol. 10: The Augustan Empire, 43 BC-AD 69, 1996, p. 580: "... 580 I3h. DANUBIAN AND BALKAN PROVINCES Tricornenses of Tricornium (Ritopek) replaced the Celegeri, the Picensii of Pincum ..."
^Dubravka Balen-Letunič, 40 godina arheoloških istraživanja u sjeverozapadnoj Hrvatskoj, 1986, p. 52: "and the Celtic Serretes"
^ abJ. J. Wilkes, The Illyrians, 1992, ISBN 0-631-19807-5, p. 81: "In Roman Pannonia the Latobici and Varciani who dwelt east of the Venetic Catari in the upper Sava valley were Celtic but the Colapiani of ..."
^J. J. Wilkes, The Illyrians, 1992, ISBN 0-631-19807-5, p. 140: "... Autariatae at the expense of the Triballi until, as Strabo remarks, they in their turn were overcome by the Celtic Scordisci in the early third century"
^Wilkes, J. J. The Illyrians, 1992,ISBN 0-631-19807-5,page 217,"... with high mountains, Siculotae (24), Glintidiones (44) and Scirtari, who dwelt along the border with Macedonia. In northeast Bosnia the Dindari are located by the record of one of their chiefs (principes) in the Drina valley"
^Population and economy of the eastern part of the Roman province of Dalmatia, 2002, ISBN 1-84171-440-2, p. 24: "the Dindari were a branch of the Scordisci"
^J. J. Wilkes, Dalmatia, Tome 2 of History of the Provinces of the Roman Empire, 1969, pp. 154 and 482.
^Charles Anthon, A Classical Dictionary: Containing The Principal Proper Names Mentioned In Ancient Authors, Part One, 2005, p. 539: "... Tor, " elevated," " a mountain. (Strabo, 293)"; "the Iapodes (Strabo, 313), a Gallo-Illyrian race occupying the valleys of ..."
^J. J. Wilkes, The Illyrians, 1992, ISBN 0-631-19807-5, p. 79: "along with the evidence of name formulae, a Venetic element among the Japodes. A group of names identified by Alföldy as of Celtic origin: Ammida, Andes, Iaritus, Matera, Maxa,"
^William M. Ramsay, Historical Commentary on Galatians, 1997, p. 302: "... these adaptable Celts were Hellenized early. The term Gallograecia, compared with Themistius' (p. 360) Γαλατία ..."
^Roger D. Woodard, The Ancient Languages of Asia Minor, 2008, p. 72: "... The Phrygian elite (like the Galatian) was quickly Hellenized linguistically; the Phrygian tongue was devalued and found refuge only ..."
^ abcdefghijPrifysgol Cymru, University of Wales, A Detailed Map of Celtic Settlements in Galatia, Celtic Names and La Tène Material in Anatolia, the Eastern Balkans, and the Pontic Steppes.