Hi,
I have found a James Adair who married a Catherine Dunbar in Regent Street Methodist Church, Newtownards on 4 Oct 1898. It was usual in Ireland, in Protestant marriages, to get married in the brides church and then the family followed the husbands religion.
Regards
PS Family appear to be in House no. 21 Movilla St. Newtownards Urban in 1911.