I also noticed on a subscription website a marriage record for a George Brunkard of 'Cornascribe' who married an Eliza Grundell at Tandragee Presbyterian Church on 22 March 1837, they had a son Robert Brunkard baptised in the same church in 1839, I don't know how they fit into the overall picture. A quick check of the 'Ancestry' website shows several trees for this family, who ended up in Canada from the early 1840s.