MEVENNYDD (MEFENYDD), a hamlet, in the parish of LLANRHYSTID, lower division of the hundred of ILAR, county of CARDIGAN, SOUTH WALES, 9 miles (S.) from Aberystwith; containing 722 inhabitants. There are some respectable residences in this township, and the river Aron has its source here, in a small lake called Ll f n Aeddwen. About 50 children are taught in a day school at the expense of their parents; and there are also three Sunday schools, one of which appertains to the Established Church, and the other two to dissenters, affording gratuitous instruction to several males and females.