▁language ▁( NE Y ) ▁grouping . ▁They ▁are ▁collect ively ▁called ▁" Ok un ", ▁which ▁in ▁the ▁Y or uba ▁language ▁means ▁' v ital ity ' ▁or ▁' str ength ', ▁and ▁is ▁the ▁word ▁commonly ▁used ▁in ▁gre eting ▁among ▁the ▁people , ▁although ▁this ▁form ▁of ▁gre eting ▁is ▁also ▁found ▁among ▁the ▁Ek iti ▁and ▁Ig b om ina ▁groups ▁of ▁Y or uba ▁people . ▁This ▁identity , ▁which ▁was ▁probably ▁first ▁suggested ▁by ▁Eva ▁Kraft - A sk ari ▁during ▁a ▁ 1 9 6 5 ▁field ▁expedition , ▁has ▁gained ▁wide ▁accept ance ▁among ▁the ▁ind igen ous ▁Y or uba ▁people ▁and ▁sch ol ars . ▁The ▁individual ▁Ok un ▁sub groups ▁share ▁some ▁historical ▁and ▁lingu istic ▁aff inity ▁but ▁still ▁maintain ▁individual ▁peculiar ities . ▁" Ok un " ▁therefore ▁refers ▁to ▁the ▁distinct , ▁but ▁cult ur ally ▁related ▁O w é , ▁ Ì y à gb à , ▁ Ì j ù m ú , ▁G bed e , ▁B ù n ú ▁or ▁Ab un u , ▁I ki ri ▁and ▁ Ò w ò r ò ▁pe op les , ▁who ▁together ▁are ▁said ▁to ▁make ▁up ▁ 2 0 % ▁of ▁the ▁K og i ▁State ▁population , ▁according ▁to ▁the ▁highly ▁controvers ial ▁ 2 0 0 6 ▁National ▁population ▁census . ▁ ▁History ▁ ▁The ▁individual ▁historical ▁accounts ▁that ▁state ▁that ▁the ▁Ok un ▁people ▁migr ated ▁from ▁I le - I fe