Templepatrick is a bit too far from my ancestors' home in north Antrim, for her to be a relative. It is still a small town, as it was in 1812; though today it is growing as a dormitory town for Belfast. There are a couple of old graveyards, and there are Presbyterian records, going unusually far back, so you might be lucky there. A local poet wrote about Templepatrick in several books of verse, and some has been republished in the last 10 years. Samuel Thomson was his name; he died I think about 1812 or 1814, so his descriptions of the village would be a bit earlier than your ancestor's life, but would overlap with her father.