Jeanie:
Since I live in the States (Baltimore), I will defer to Ger on your distance question except to say that it was not unusual to have a couple marry and they were from neighboring parishes.
Below are five more baptismal records including a twin for Maria. The NLI register starts in 1842 but Roots has records back to 1825. The Registers on the NLI site were filmed in the 1950s. I'm guessing that the parish later found an earlier register book that went back to 1825 so when the Heritage folks in Limerick came to transcribe the data the earlier book was available, and they were able to go back to 1825. One caution. Roots does indicate that there is a gap in the baptismal records for 1835 and 1838-1839. Basically that info was lost which explains why we don't have a record for Denis and Patrick.
Let me know if you have questions.
Roger
Name:Johanna GillaneDate of Birth:
Date of Baptism:18-Jan-1826Address:?Parish/District:ROCKHILL & BRUREEGender:UnknownCountyCo. Limerick
Denomination:Roman Catholic
Father:Thomas GillaneMother:Joh. SheedyOccupation:
Sponsor 1 /
Informant 1:Denis GillaneSponsor 2 /
Informant 2:Maria Gillane
Name:Hanora GillaneDate of Birth:
Date of Baptism:30-May-1830Address:?Parish/District:ROCKHILL & BRUREEGender:UnknownCountyCo. Limerick
Denomination:Roman Catholic
Father:Thomas GillaneMother:Johanna SheedyOccupation:
Sponsor 1 /
Informant 1:Carol RahillySponsor 2 /
Informant 2:Maria Conners
Name:John GillaneDate of Birth:
Date of Baptism:15-Jul-1832Address:?Parish/District:ROCKHILL & BRUREEGender:UnknownCountyCo. Limerick
Denomination:Roman Catholic
Father:Thomas GillaneMother:Joh. SheedyOccupation:
Sponsor 1 /
Informant 1:Ml. SheedySponsor 2 /
Informant 2:Maria Quilty
Name:Thomas GillaneDate of Birth:
Date of Baptism:08-Apr-1834Address:?Parish/District:ROCKHILL & BRUREEGender:UnknownCountyCo. Limerick
Denomination:Roman Catholic
Father:Thomas GillaneMother:Joh. SheedyOccupation:
Sponsor 1 /
Informant 1:Johanna GillaneSponsor 2 /
Informant 2:Not Recorded
Name:James GillaneDate of Birth:
Date of Baptism:05-Dec-1841Address:?Parish/District:ROCKHILL & BRUREEGender:UnknownCountyCo. Limerick
Denomination:Roman Catholic
Father:Thomas GillaneMother:Joh. SheedyOccupation:
Sponsor 1 /
Informant 1:Denis GillaneSponsor 2 /
Informant 2:Johanna Gillane