ed ▁by ▁Rom ans ▁in ▁ 2 2 9 – 1 6 7 ▁BC , ▁the ▁Th ra ci ans ▁were ▁conquer ed ▁in ▁ 4 5 ▁AD ▁and ▁the ▁Da ci ans ▁in ▁ 1 0 6 ▁AD . ▁The ▁ancient ▁Il ly rian ▁place - names ▁of ▁the ▁region ▁have ▁achieved ▁their ▁current ▁form ▁following ▁Alban ian ▁ph on etic ▁rules ▁e . g . ▁Dur rach ion ▁> ▁D urr ë s ▁( with ▁the ▁Alban ian ▁initial ▁acc ent ), ▁A ul ona ▁> ▁V lor ë ▁( with ▁r hot ac ism ), ▁Sc od ra ▁> ▁Sh k od ë r , ▁etc . ▁The ▁characteristics ▁of ▁the ▁Alban ian ▁dialect s ▁T os k ▁and ▁Geg ▁in ▁the ▁treatment ▁of ▁the ▁native ▁and ▁loan words ▁from ▁other ▁languages , ▁have ▁led ▁to ▁the ▁conclusion ▁that ▁the ▁dialect al ▁split ▁occurred ▁after ▁Christian isation ▁of ▁the ▁region ▁( 4 th ▁century ▁AD ) ▁and ▁at ▁the ▁time ▁of ▁the ▁S lav ic ▁migration ▁to ▁the ▁B alk ans ▁or ▁there after ▁between ▁the ▁ 6 th ▁to ▁ 7 th ▁century ▁AD ▁with ▁the ▁historic ▁boundary ▁between ▁the ▁Geg ▁and ▁T os k ▁dialect s ▁being ▁the ▁Sh k um bin ▁river ▁which ▁str add led ▁the ▁J ire č ek ▁line . ▁ ▁Arg uments ▁against ▁Il ly rian ▁origin ▁The ▁theory ▁of ▁an ▁Il ly rian ▁origin ▁of ▁the ▁Alban ians ▁is ▁challeng ed ▁on ▁arch ae ological ▁and ▁lingu istic ▁grounds . ▁Although ▁the