Hi Marie
Coolagh and Ballinahimmy are both townlands in Clonaslee Parish, a little west of Clonaslee village.
There is today a family of Dalys still living in Coolagh, they would probably be your cousins.
In Griffiths Valuation of Ireland,1850, there is a Luke Daly living in Killinaparson,another townland,very close to Coolagh.
In the 1841 census,175 people lived in Killinaparson.By 1851 following the Famine,there were only 31
people there, and today this townland has no population, a place that never recovered from the Famine.
hope this helps.
Jim K