Bob:
Welcome to Ireland Reaching Out!
The baptismal records for Kilshalvey/Kilturra RC parish start in 1842 http://registers.nli.ie/parishes/0124 and I only located one baptismal record (Michael) on Roots Ireland where the parents were John and Catherine which is below. The address is shown as Cough which probably was Coagh. Not sure why I can't find other records since you have years of birth that are much later than 1842. You may want to peruse the register. The 1858 Griffiths Valuation head of household listing shows a John Healy in Coagh townland so they were still in the area.There are two Heally/Heally families in Coagh in the 1901 census but no sign of Rodger.
Roger McDonnell
Name:Michael HealyDate of Birth:
Date of Baptism:13-Aug-1842Address:CoughParish/District:KILSHALVEY KILTURRAGender:MaleCountyCo. Sligo
Denomination:Roman Catholic
Father:John HealyMother:Catherine McGloinOccupation:
Sponsor 1 /
Informant 1:Dominick Healy Sponsor 2 /
Informant 2:Bridget McGlocklin