▁the ▁native ▁name ▁or ▁was ▁given ▁to ▁them ▁by ▁the ▁Gree ks ▁for ▁their ▁residence ▁near ▁the ▁E bro ▁remains ▁unknown . ▁Cred ence ▁in ▁Poly b ius ▁impos es ▁certain ▁limitations ▁on ▁et ym olog izing : ▁if ▁the ▁language ▁remains ▁unknown , ▁the ▁mean ings ▁of ▁the ▁words , ▁including ▁I ber , ▁must ▁also ▁remain ▁unknown . ▁In ▁modern ▁Bas que , ▁the ▁word ▁i bar ▁means ▁" val ley " ▁or ▁" water ed ▁me adow ", ▁while ▁i b ai ▁means ▁" river ", ▁but ▁there ▁is ▁no ▁proof ▁rel ating ▁the ▁et ym ology ▁of ▁the ▁E bro ▁River ▁with ▁these ▁Bas que ▁names . ▁ ▁Pre history ▁ ▁Pala e ol ith ic ▁The ▁I ber ian ▁Pen ins ula ▁has ▁been ▁inhab ited ▁for ▁at ▁least ▁ 1 . 2 ▁million ▁years ▁as ▁remains ▁found ▁in ▁the ▁sites ▁in ▁the ▁At ap uer ca ▁Mountains ▁demonstrate . ▁Among ▁these ▁sites ▁is ▁the ▁cave ▁of ▁Gran ▁Dol ina , ▁where ▁six ▁hom in in ▁ske let ons , ▁dated ▁between ▁ 7 8 0 , 0 0 0 ▁and ▁one ▁million ▁years ▁ago , ▁were ▁found ▁in ▁ 1 9 9 4 . ▁Exper ts ▁have ▁deb ated ▁whether ▁these ▁ske let ons ▁belong ▁to ▁the ▁species ▁H omo ▁ere ct us , ▁H omo ▁he idel berg ensis , ▁or ▁a ▁new ▁species ▁called ▁H omo ▁ante cess or . ▁ ▁Ar ound ▁ 2 0 0 , 0 0 0 ▁B P , ▁during