TIRMYNYCH (TIR-Y-MYNEICH), a township, in the parish of LLANVIHANGEL-GENEU'R-GLYN, union of ABERYSTWITH, upper division of the hundred of GENEU'R-GLYN, county of CARDIGAN, SOUTH WALES; containing 276- inhabitants, who are exclusively employed in agriculture. Here is a Sunday school, which 35 males and females are gratuitously instructed.