▁are ▁that ▁it ▁either ▁came ▁from ▁" strong hold ▁by ▁the ▁bridge ( s )" ▁or ▁is ▁the ▁latin isation ▁of ▁the ▁British ▁word ▁D our bru f ▁meaning ▁" swift stream ". ▁D uro b riv is ▁was ▁pron ounced ▁' Rob riv is . ▁In ▁later ▁times , ▁the ▁word ▁c æ ster ▁(= castle , ▁from ▁Latin ▁cas tr um ) ▁was ▁added ▁to ▁the ▁name ▁and ▁the ▁city ▁was ▁called ▁Rob riv is ▁C æ ster . ▁B ede ▁mentions ▁the ▁city ▁in ▁ca . ▁ 7 3 0 ▁and ▁calls ▁it ▁H ro f es ▁c æ ster , ▁mist aking ▁its ▁meaning ▁as ▁H ro fi ' s ▁fort ified ▁camp . ▁From ▁this ▁we ▁get ▁c . ▁ 7 3 0 ▁H ro f æ sc æ stre , ▁ 8 1 1 ▁H ro f esc ester , ▁ 1 0 8 6 ▁R ov esc ester , ▁ 1 6 1 0 ▁Ro chester . ▁The ▁Latin ised ▁ad jective ▁' R off ensis ' ▁refers ▁to ▁Ro chester . ▁ ▁History ▁ ▁Ne ol ith ic ▁remains ▁have ▁been ▁found ▁in ▁the ▁vic inity ▁of ▁Ro chester ; ▁over ▁time ▁it ▁has ▁been ▁various ly ▁occupied ▁by ▁Cel ts , ▁Rom ans , ▁J utes ▁and / or ▁Sax ons . ▁During ▁the ▁C elt ic ▁period ▁it ▁was ▁one ▁of ▁the ▁two ▁administrative ▁cent res ▁of ▁the ▁Cant ia ci ▁tribe . ▁During ▁the ▁Roman ▁con quest ▁of ▁Britain ▁a ▁decis ive