I am looking for the Kernahan family. Three brothers emigrated from (it is said) Londonderry, Ireland. They emigrated to Trinidad WI and settled there. The first of the three, Acheson Thompson Kernahan, left Trinidad in 1854/55 and settled in the States. William, the second brother, died in Trinidad in 1878. I do not know what happened to the third brother, Nelson Smith.
I would like to find out where these three brothers came from. I cannot trace them in Ireland, and what were the names of their parents. Any help will be greatly appreciated. Please reply to firstname.lastname@example.org