▁( see ▁below ). ▁ ▁Conc ern ing ▁the ▁question ▁of ▁when ▁this ▁supposed ▁imm igration ▁from ▁across ▁the ▁Rh ine ▁happened , ▁it ▁was ▁at ▁least ▁some ▁gener ations ▁before ▁Ca esar . ▁He ▁reports ▁that ▁the ▁Germ ani ▁c is r hen ani ▁in ▁the ▁Lim burg ▁region ▁were ▁the ▁only ▁people ▁in ▁Ga ul ▁who ▁had ▁def ended ▁themselves ▁successfully ▁from ▁the ▁migr ations ▁of ▁the ▁C imb ri ▁and ▁Te ut ones ▁in ▁the ▁second ▁century ▁B CE . ▁The ▁A du atu ci ▁on ▁the ▁other ▁hand , ▁were ▁descend ants ▁of ▁those ▁C imb ri ▁who ▁had ▁been ▁allowed ▁to ▁sett le ▁in ▁a ▁particular ▁area ▁within ▁the ▁region . ▁So ▁in ▁effect ▁Ca esar ▁used ▁the ▁term ▁two ▁different ▁ways , ▁and ▁it ▁is ▁likely ▁that ▁the ▁original ▁narrow ▁meaning ▁of ▁the ▁word ▁was ▁specific ▁to ▁the ▁people ▁living ▁in ▁and ▁around ▁modern ▁Lim burg , ▁in ▁the ▁later ▁Roman ▁C iv itas ▁Tun gr orum . ▁ ▁Whether ▁or ▁not ▁any ▁of ▁the ▁Belg ian ▁Germ ani , ▁or ▁indeed ▁the ▁A du atu ci , ▁spoke ▁a ▁German ic ▁language ▁is ▁uncertain . ▁The ▁names ▁of ▁their ▁leaders ▁and ▁their ▁tribes ▁for ▁the ▁most ▁part ▁appear ▁to ▁have ▁C elt ic ▁orig ins , ▁which ▁is ▁in ▁fact ▁also ▁true ▁of ▁the ▁neighbour ing ▁tribes ▁across ▁the ▁Rh ine ▁in ▁" G erman ia " ▁at ▁that ▁time , ▁such ▁the ▁Ten ct eri ▁and ▁Us ip etes . ▁On ▁the ▁other ▁hand ,