ai ▁district , ▁while ▁the ▁settlement ▁of ▁the ▁Bar ang as ▁people ▁( Bar aki ) ▁are ▁in ▁the ▁down stream ▁region . ▁On ▁the ▁northern ▁side ▁of ▁the ▁up stream ▁region ▁from ▁the ▁former ▁Bak ump ai ▁district ▁is ▁the ▁Mang k at ib ▁( M eng k at ib ) ▁district , ▁which ▁makes ▁the ▁settlement ▁of ▁the ▁Day ak ▁Bar a ▁Dia ▁people ▁or ▁Day ak ▁M eng k at ib ▁people . ▁The ▁Bak ump ai ▁people ▁as ▁well ▁as ▁the ▁M eng k at ib ▁people ▁are ▁descend ants ▁of ▁the ▁Ng aju ▁people ▁from ▁Tan ah day ak . ▁ ▁Et ym ology ▁The ▁name ▁" B ak ump ai " ▁is ▁a ▁nick name ▁for ▁Day ak ▁people ▁who ▁live ▁along ▁the ▁Bar ito ▁River b anks . ▁In ▁the ▁Ban jar ▁language , ▁Bak ump ai ▁comes ▁from ▁the ▁word ▁ba ▁which ▁means ▁" own " ▁and ▁k ump ai ▁which ▁means ▁" gr ass ". ▁From ▁this ▁nick name , ▁it ▁is ▁understood ▁that ▁this ▁people ▁dwell ▁in ▁the ▁grass land ▁region . ▁ ▁M yth ology ▁According ▁to ▁legend , ▁the ▁orig ins ▁of ▁the ▁Bak ump ai ▁Day aks ▁came ▁from ▁Ng aju ▁people ▁who ▁settled ▁on ▁the ▁current ▁land ▁which ▁is ▁called ▁Mar ab ah an . ▁In ▁the ▁beginning , ▁they ▁practice ▁K ah aring an , ▁the ▁religion ▁of ▁their ▁ancest ors , ▁which ▁can ▁be ▁seen ▁as ▁well ▁in ▁the ▁cult ures ▁of ▁other ▁Day ak ▁people .