Hi, the dates are slightly off but my John A. Gallaher was born between 1738 - 1767, in Ireland. He landed in Moundsville, West Virginia, and later settled in Dilles Bottom, Belmont County Ohio. His son, John A. Gallaher Jr., was born in Moundsville, West Virginia in 1789. He married Mary Talbert. The mystery in my search is John Sr.'s wife. I don't know if they came over together, or if he met and married her in West Virginia. I believe that she remarried Thomas Coleman and eventually settled in Missouri.
Let me know if you see any possible connections. Thanks!