John Martin (b.1730) and his brother William Martin (1729-1806)came to Chester County circa 1772 from Antrim Ireland. These were Presbyterians (Covenanters) on five boats. David's son Reuben M. Martin (1812-1963) was killed in the Civil War. His widow & children came to Indiana and were my mother's paternal side of the family. I'm trying to fill in the gaps backwards to David Martin b1700, and on back. Can anyone help? I'm willing to share information on this family.