Thank you for your message. It took a few reads as it is quite confusing with two two Condy?s and brothers marrying sisters and twins etc.!
In order to find Condy Bonar?s wife?s maiden name, you will have to find their marriage certificate. The marriage would have taken place before 1864 so it would not be recorded in civil records, it will only be in church records. As most church records are still held locally you need to know the parish that they were married in. Hopefully this was Lettermacward as the family were based there. You should also try to find Annie or Ellen?s birth certificate as mother?s maiden names were often recorded on Catholic records.
Most Catholic records are held locally so you may need to write to the local parish priest for possible assistance. One website that you may find useful is the Irish Times where they give an overview of what records are available in specific parishes. For Lettermacward/Dungloe parish, follow this link:
Unfortunatley, the start date for records here is very late. However, in the19th century new Catholic parishes were created so starting dates can sometimes be misleading. Many parishes changed their geographical spread so you may find earlier records relating to your family in the records of adjoining parishes. Here is amp of Catholic parishes in Donegal:
Most surviving Church of Ireland records are still held by the local clergy, although some are in the National Archives of Ireland and others are in the Representative Church Body Library in Dublin. Here are their websites: http://www.nationalarchives.ie/ and http://ireland.anglican.org/about/42
Lists of these surviving registers can also be found at the National Library of Ireland.
www.familysearch.org have some birth and marriage church records for Ireland available, you may be lucky and find a record online here.
Alternatively, you could try contacting Donegal Ancestry Centre as they may have copies of what records are available. Here is their email: email@example.com
I hope that this is helpful. Please be patient - as our programme has only begun to rollout across the island of Ireland and volunteers in some areas may not yet be organized.