▁In ▁his ▁ 1 9 5 4 ▁Mon mouth shire ▁Sk etch ▁Book ▁H ando ▁writes : ▁" G arn ▁L l w yd , ▁G wer n - y - C le ppa ▁and ▁H eston ▁Bra ke ▁are ▁our ▁three ▁out standing ▁dol m ens ". ▁ ▁Roman ▁remains ▁There ▁is ▁some ▁evidence ▁of ▁a ▁Roman ▁villa , ▁with ▁possible ▁British ▁Iron ▁Age ▁ante ced ents . ▁ ▁There ▁are ▁also ▁remains ▁of ▁a ▁late ▁Roman ▁temple ▁on ▁Port ske w ett ▁Hill , ▁and ▁many ▁co ins ▁of ▁the ▁ 3 rd ▁and ▁ 4 th ▁centuries ▁have ▁been ▁found . ▁ ▁Early ▁Wel sh ▁history ▁The ▁name ▁Port ske w ett ▁is ▁generally ▁believed ▁to ▁derive ▁from ▁the ▁Wel sh ▁P orth - is - Co ed , ▁meaning ▁" the ▁har bour ▁below ▁the ▁wood ", ▁or ▁altern atively ▁" the ▁har bour ▁of ▁the ▁area ▁below ▁the ▁wood " ▁- ▁that ▁is , ▁the ▁post - R oman ▁cant ref ▁of ▁G w ent ▁Is ▁Co ed , ▁cent red ▁on ▁Ca er w ent ▁about ▁ 3 ▁miles ▁away . ▁An ▁alternative ▁deriv ation ▁is ▁from ▁P orth ▁Y s gew y dd , ▁the ▁port ▁of ▁the ▁elder ▁wood . ▁ ▁According ▁to ▁tradition , ▁in ▁about ▁the ▁ 6 th ▁century ▁Car ad og ▁Fre ich fr as , ▁king ▁of ▁G w ent , ▁moved ▁his ▁l ly s ▁or ▁court ▁from ▁Ca er w ent ▁to ▁Port ske w ett , ▁where