Hi Marli,
I have walked all those graveyards in Laois, 3 years going to every town and village in Laois and finding little cemeteries in 'far flung places', but as in the cemeteries that you would have the most interest, the headstones were beyond reading in most cases.
The surname Cummins, as we 'loclas' would say, is not a Laois name, but a Kilkenny name, thus I think you search would seve best there.
Below are the Cummins I found in Laois cemeteries, but none go back far enough for your research.
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Ballaghmore-Borris-in-Ossory;
Cummins John; 24/2/1955 Rossdorraugha
Catherine-wife; 17/2/1962
Carroll Mary Ann-her sister; 27/3/1956
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Portarlington;
Cummins James; 23/4/1933 (83)
Ellen;
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Ballacolla Old;
Cummins William; 29/5/1904 (56) Rahandrick
Nora-wife; 2/8/1909 (91)
Laurence-son; 8/5/1927 (73)
Cummins William; 25/7/1956
Cummins Laurence; 26/3/1965
Nora-sister; 18/3/1978
Kryan-brother; 5/8/1995
Anastacia-wife; 5/8/1993
----
Cummins Laurence; 3/11/1903 (40) Cannonswood
Mary-wife; 2/3/1942 (79) (nee Bergin)
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Abbeyleix;
Cummins Michael; 9/8/1948
Bridget-dtr-; 2/3/1932
Gerard-son; 9/1/1938
Catherine-wife; 30/11/1967
Cummins Thomas; 20/11/1924
Julia-wife; 28/7/1949
Carrie Elizabeth-dtr; 16/11/1964
Martin-son; 25/2/1982
William-son; 17/8/1986
===========================
Skeirke; Borris-in-Ossory;
Cummins Thomas; 5/3/1955
Mary-wife; 17/3/1945
Sophia-dtr; 1921
Mary-wife; 15/8/1936
Patrick-son; 17/8/1963
Teresa-grand-dtr; 3/5/1979
William-son; 19/7/1994
Jack-son; 21/11/1994
=====================
Jack