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The subscription site Roots Ireland has three older siblings to Ellen: Anastastia (see transcription below) 1801 Nicholas 1802 Mary 1804 So there was a ten year gap between Mary and Ellen. You may want to search the parish register https://registers.nli.ie/parishes/0985 to see if there were other children between 1804 and 1814.
I did not find a marriage record.
Name:Anastatia LanaganDate of Birth:
Date of Baptism:14-Jan-1801Address:LeughParish/District:FRESHFORDGender:FemaleCountyCo. Kilkenny
Father:Patrick LanaganMother:Judith KeefeOccupation:
Sponsor 1 /
Informant 1:Edmund RockSponsor 2 /
Informant 2:Elizabeth Curren