▁wrong ly ▁considered ▁the ▁same ▁language ▁by ▁ancient ▁writers . ▁The ▁Ven etic ▁tribes , ▁formerly ▁considered ▁Il ly rian , ▁are ▁no ▁longer ▁considered ▁categor ised ▁with ▁Il ly ri ans . ▁The ▁same ▁is ▁sometimes ▁said ▁of ▁the ▁Th ra cian ▁language . ▁For ▁example , ▁based ▁on ▁the ▁to pon ym s ▁and ▁other ▁lex ical ▁items , ▁Th ra cian ▁and ▁Da cian ▁were ▁probably ▁different ▁but ▁related ▁languages . ▁ ▁The ▁debate ▁is ▁often ▁polit ically ▁charged , ▁and ▁to ▁be ▁conclus ive , ▁more ▁evidence ▁is ▁needed . ▁Such ▁evidence ▁unfortunately ▁may ▁not ▁be ▁easily ▁forth coming ▁because ▁of ▁a ▁lack ▁of ▁sources . ▁Curt is , ▁echo ing ▁Fine ▁and ▁C abe j ▁before ▁him , ▁ca utions ▁that ▁Alban ians ▁as ▁well ▁as ▁" all ▁B alk an ▁pe op les " ▁are ▁" al most ▁certainly ▁not ▁made ▁up ▁of ▁the ▁descend ants ▁of ▁( only ) ▁one ▁ancest ral ▁group ". ▁ ▁Il ly rian ▁origin ▁ ▁The ▁theory ▁that ▁Alban ians ▁were ▁related ▁to ▁the ▁Il ly ri ans ▁was ▁proposed ▁for ▁the ▁first ▁time ▁by ▁the ▁Swedish ▁historian ▁Johann ▁Er ich ▁Th un mann ▁in ▁ 1 7 7 4 . ▁The ▁sch ol ars ▁who ▁advoc ate ▁an ▁Il ly rian ▁origin ▁are ▁numerous . ▁There ▁are ▁two ▁variants ▁of ▁the ▁theory : ▁one ▁is ▁that ▁the ▁Alban ians ▁are ▁the ▁descend ants ▁of ▁ind igen ous ▁Il ly rian ▁tribes ▁dwell ing ▁in ▁what ▁is ▁now ▁Alban ia .