I wouldn’t blame ya. Of course, if the titles were in Welsh, the list could have been much longer...
Welsh place names are descriptive. Pen (end). Pont (bridge). Pen-y-Bont (end of the bridge). English name: Bridgend. Cities at the mouth of a river begin with Aber. Aberystwyth, Aberaeron, Abertawe(Swansea). Military castles (forts) start with Caer. Caerdydd (Cardiff, day fort). Caerfyrddin (Myrddin's fort...Merlin the magician). Church locations start with Llan. Llanfihangel-y-Creuddyn (Mihangel (michael's church), Llanafon (river church). Cwm is a valley. Cwmystwyth is a town in the Ystwyth river valley. Pontrhydygroes--> Pont (bridge), groes (croes...cross), rhyd (a river ford). This location is a crossroads that fords the river.
Check how the map link shows the descriptive nature of Pontrhydygroes.
My great grandfather lived in a house on the road at this link and worked in the lead mines on the lower right. His house was still standing when I visited in 1997. Ystbyty Ystwyth