▁been ▁found ▁in ▁the ▁region ▁along ▁the ▁banks ▁of ▁river ▁Yam una ▁in ▁Kal si ▁indicating ▁the ▁wealth ▁and ▁importance ▁of ▁the ▁region ▁in ▁ancient ▁India . ▁In ▁the ▁neighbour ing ▁region ▁of ▁Har ip ur , ▁ru ins ▁were ▁discovered ▁from ▁the ▁time ▁of ▁King ▁Ras ala ▁which ▁also ▁reflect ▁the ▁region ' s ▁prosper ity . ▁Before ▁the ▁name ▁of ▁De hr ad un ▁was ▁used , ▁the ▁place ▁is ▁shown ▁on ▁old ▁maps ▁as ▁G ur ud w ara ▁( a ▁map ▁by ▁Web b , ▁ 1 8 0 8 ) ▁or ▁Go or ood w ara ▁( a ▁map ▁by ▁Ger ard , ▁ 1 8 1 8 ). ▁Ger ard ' s ▁map ▁names ▁the ▁place ▁as ▁" De h ra ▁or ▁Go or ood w ara ". ▁S urr ounding ▁this ▁original ▁S ikh ▁temple ▁were ▁many ▁small ▁villages ▁that ▁are ▁now ▁the ▁names ▁of ▁parts ▁of ▁the ▁modern ▁city . ▁ ▁De hr ad un ▁itself ▁der ives ▁its ▁name ▁from ▁the ▁historical ▁fact ▁that ▁Ram ▁R ai , ▁the ▁el dest ▁son ▁of ▁the ▁Se vent h ▁S ikh ▁G uru ▁Har ▁R ai , ▁set ▁up ▁his ▁" D era " ▁( camp ) ▁in ▁" d un " ▁( val ley ) ▁in ▁ 1 6 7 6 . ▁This ▁' D era ▁Dun ' ▁later ▁on ▁became ▁De hr ad un . ▁ ▁The ▁M ug hal ▁Emperor ▁Aur ang z eb ▁was ▁highly ▁im pressed ▁by ▁the ▁mi rac ul