Thanks. The reason I was asking was that I have some Kinkeads of Ballykelly that married Kerrs and moved to California. James Kinkead marred Mary Kerr on 23 June 1870 and settled in Nevada City. His wife's sister, Sarah Kerr, was with him in the 1900 census.
Do your Kerrs have any connections to Davidson or Rutherford County, Tennessee?
I am not sure if you are aware of this, but one of the ministers of Ballykelly Presbyterian Church was John Haslett (1752-1757). He married a Miss Stirling of Walworth who was believe to have been the daughter of the previous minister, Rev. John Stirling.