The following information was found on the Latter Day Saints website www.familysearch.org
Marten Butler born 10 Feb 1865 #0452 Fontstown Civil Registration District,Kildare parents George Butler and Marcella Cahill.www.labs.familysearch.org
1864 marriage George Butler, Naas Registration District
#101249 Vol.7 Page 839
1864 marriage Marcella Cahill, Baltinglass Registration District #101249, Vol.7 Pg. 474
George Butler registered death April-June 1904 age 63,
Naas Registration District #101602 Vol.2 Pg. 653
George Butler and Marcella Cahill, parents of
Marten Butler, information as above
Mary #471 Fontstown Registration District 29 Dec 1869
Bridget #0451 Fontstown RD 01 Mar 1867 C0121-3/101142
Leo A.M. Butler registration of birth April-June 1944, Naas RD (Clark) I'm assuming this is the mother's maiden name?
#101236 Vol.2 Pg. 365
Leo Anthony Butler birth registration April-June 1902
#101069 vol.2 Pg. 810
(Perhaps I misunderstood but I don't think this Leon would be a brother to Martin being 30+ years apart)
Anne Loakman has 12 records on the above website.
Kildare WWI Casualties, James Butler, Naas, Kildare, Machine Gun Corp. Active April 1 1916(might be a connection)
There is a website of a group/Foundation of County genealogy offices, however, in Kildare County records shows no records are showing for these names. The 1865 should be there as it is a Civil Registration. I'm not sure why these are not there.
Fontstown, formerly Fulestown Parish is in an area of West Ofaly as well as Kildare. However, Offaly is not on line at this time.
Griffith Valuation of Ireland is considered a census substitute, Kildare 1852:
The only George is as follows:
George Butler, Parish of Lackagh, Townland of Cherryville
tenant of Christopher Bailey, property #3A land 2 acres.3 Roods and 38 perches #3B house and land 1.2.34 PLU Athy
not sure that George Butler would have had his own land in 1852 as he didn't marry till 1864 this could be someone else entirely)
There are 55 Butlers and 29 Cahill's in Kildare:
Martin Cahill Parish of Davidstown, Townland of Calverstown PLU Naas, tenant of Robert H. Borrowes 10Ba house and land 1.1.13 and 10A Charles Cooper 1.0.23
No Butler in the Parish of Davidstownwww.askaboutireland.ie
National Archives UK, shows some Military records but don't know if there is any connection.
Soldiers that died in Great War:
Martin Butler, Whiteabbey. Co. Antrim, Ireland
Martin Butler, Shinrone, Offaly/Kings Co.Ireland