Just to note as possible siblings of Mary Ann Galway... I can see transcripts of baptisms in Seagoe Church of Ireland parish for children of a William and Sarah Galway (no maiden name mentioned for Sarah): Margaret 1833 (address = Tarsan); Elizabeth 1835 (address = Tarsan); Benjamin 1838 (address = Tarsan); William 1840 (address = Tarsan); Jane 1846 (address = Drumnagoon); William John 1851 (address = Tarsan). I haven't yet found a Mary Ann but as you can see, there are gaps where she could have been born / baptised, so for now, just to post this as a possibility until it can be ruled in or out.
Finally, I've found a transcript of a possible baptismal entry for Mary Anne Galway, baptised in that name on 22 April 1842 in Seagoe Church of Ireland Parish, father recorded as William Galway of Drumnagoon... but the snag is that the mother is transcribed as as Anne, not Sarah. I would love to see an image of the original register myself to make my own judgement on whether it says 'Anne' or not. Or perhaps it says Anne and Sarah Killow was more fully Sarah Anne Killow?
Anyhow, when I consider this baptism in the overall context of the other baptisms, with the geography (Drumnagoon), the father's name (William Galway) and the church (Seagoe Parish Church), my gut is telling me that this is indeed the Mary Anne who married Richard Canavan.
Possible marriages for siblings of Mary Anne Galway, all in Seagoe CoI Parish Church:
- Benjamin Galway of Tarsan to Mary Jane Caddle in 1861:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1861/09614/5486703.pdf- William John Galway of Ballynery to Lizzie McNiece in 1873:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1873/11260/8129756.pdf- Elizabeth Galway of Ballynery to Thomas Holland, also in 1873:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1873/11270/8133325.pdf