Knockmealdown is the Anglicised form of an olderIrish name. The original Irish name is widely believed to be Cnoc Mhaoldomhnaigh, meaning "Muldowneys' hill". It has also been suggested that it is derived from Cnoc Maol Donn, meaning "bald brown hill". In 1654 the name was recorded as Knockmealdowny, indicating there was an extra syllable at the end.
The peak is easily accessed from the west, via the layby overlooking Bay Lough on the Vee Gap. This involves first climbing Sugarloaf Hill. It may also be climbed by following the Glannandaree stream from the carpark at the point where the R668 and R669 roads meet.