The name of Mullinahone appears first as a settlement in the records of the “Hearth Money Rolls” in the years 1665 to 1667 then spelled as Moninehoan. The “Hearth Money Rolls” were a rent or tax on houses in the post-Cromwellian period. It was entered as a village or settled area of nine 'cabbins' with hearths, that is, permanent structures, which were not very common then it appears after the wars of the time. Just across the river ( a tributary of the River Anner) was the main village of Killaghy, in what is now Fethard and Killaghy streets. Both were extensions of the worker/artisan settlements of Killaghy Castle and lands whose estate walls adjoin the modern town today. Killaghy has existed since the first lord of Killaghy or Compsey, named St Aubyn or Tobin, built his castle there in the 13th century.