Abertridwr

Morphology: aber+tri+dwr
Phonetic: abb-airr-tree-doo-rr

The name means "mouth of the three brooks", these being Nant Cwmceffyl, Nant Cwm Parc and a stream running down from Eglwysilan church. The village is situated in a valley where the three streams merge into one, Nant yr Aber, which flows out of the valley and joins the River Rhymney. Shown as Aber-tridwr in 1885.