Madigan/ Scanlon Help please

Hi, My Great Great Grandmothers name was Ellen Madigan. My maths isnt great but I think she would have been born between 13th Jan and 11th Sept 1853 as her 1st Australian marriage cert shows she is 21yo on the 11th Sept 1873.She married a Patrick Gallagher from Donegal. She was widowed and her 2nd Australian marriage cert gives her age as 31yo on the 13th Jan 1885. She gave her birthplace as County Clare. My Mothers Aunt Pat always said the family came from kilrush. Ellen Madigans marriage certificate also names her parents as Patrick Madigan (Boatman) and Bridget Scanlon. I had a look on this site at the "Griffiths Valuation of Ireland - Kilrush, County Clare" and was excited to see there was a Patrick Madigan and Bridget Scanlon on Pound Street. Is there anyway to find out if these people were a couple and if they had a daughter named Ellen? Also (now this part might be a bit of a stretch) I noticed a Patrick Madigan and Ellen Madigan on Henry Street. I know its a bit of a stretch but is there anyway to find out if the Henry street Patrick and Ellen Madigan are the parents of the Pound Street Patrick Madigan. I was just thinking it would make sense that he was named after his Father and named his Daughter after his Mother. Im not sure when or how she came to Australia just that she was here before 11th Sept 1873. Hope someone can help. Thanks Cam Carter.