Many thanks for your query to Ireland Reaching Out.
You might consider looking at a number of resources for tracking the Rawleigh family who lived in Rawleighstown.
There are a large number of Rawleigh (with variants) families who are listed in County Limerick in the Roots Ireland database.
In addition, the Tithe Applotment Books also listed 7 Rawleigh members who were living in the Knockainey area in 1833.
Griffith's Valuation might be another resource for you to look at the Rawleigh members who remained in the area. This Valuation was completed in County Limerick in 1852. It is available at the following link:
Further, local histories and headstone inscriptions (which I note you have checked) are invaluable for trying to trace families before 1800 in particular.
If you have any further questions, please contact us.