Hi Katrina
So, we have the right family in 1901. We also have Margaret's birth place confirmed as Ireland (Co.Mayo from submitted IGI records). There is a submitted entry for a Catherine Costello born in Co. Mayo who married a John Horan. The reason I asked whether you were sure if the name of Margaret's father was Owen, is because of this birth/marriage record for Catherine Costello. If the writing on the 1998 marriage cert. is hard to read, it would be worthwhile you contacting SP so that they can send you out (via email these days) a clearer copy of the image.
Alternatively, you could look at Margaret's death cert to reconfirm father's name. You could also, as Ambly suggested earlier post the relevant section of the MC here on this thread for people to have a look at in order to help. Finally, if they followed Scottish naming pattern, you may well see the use of John rather than Owen in the naming of their sons (hard to say as censuses stop at 1901 at present).
As I mentioned earlier, it would appear that someone has already been researching this family given the number of submitted entries on family search.org. There are also further children showing for
John Horan and Catherine Costello on IGI, all actual extracts from the records:
1. HONORIA HORAN Birth: 24 DEC 1865 0574, Lowpark, Mayo, Ireland
2. JOHN HORAN Birth: 31 MAY 1868 , Mayo, Ireland
3. PATRICK HORAN Birth: 26 NOV 1870 , Mayo, Ireland
4. Winefred Horan Birth: 05 JUL 1873 , Mayo, Ireland
It certainly feels as if this is Margaret Horan's family.
Regards.
Monica
