Aberthaw (East) (Aber-Ddaw), a small sea-port and hamlet, in the parish of Penmark, union of Cardiff, hundred of Dinas-Powys, county of Glamorgan, South Wales, 7 ½ miles (S.S.E.) from Cowbridge the population is returned with the parish. This place is situated on the east bank and near the mouth of the river Ddaw, from which it derives its name, and had formerly a chapel, which has fallen to ruin. The harbour is small, and is only resorted to by a few coasting vessels of inferior burthen, for the purpose of conveying the produce of the district to other places, especially lias limestone, called Aberthaw tarras, which is much used in making cement for works under water, and for canal locks, &c.
Source: A Topographical Dictionary of Wales by Samuel Lewis Third Edition Published London; by S. Lewis and Co., 13, Finsbury Place, South. M. DCCC. XLV.