The tithe applotment records for 1834 list 5 Cull farms in Clonallan, including one in Clontifleece as well as some Carvills.
You’ll find a few Carvills & Culls from Clonallan in this link to Rosdavies site. Linking the entries to your particular family may be tricky though:
I had a look at the British Newspapers Archive to see if there are any relevant mentions of your families in the early 1800s but did not see anything relevant.
There aren’t many records for this period in Ireland as you have probably discovered. Research for this period can be hard going.