Isaac Coffin was born in Boston, Massachusetts on 16 May 1759, the fourth and youngest son of the paymaster of the customs in the port, Nathaniel Coffin.
Isaac Coffin was born in Boston, Massachusetts on 16 May 1759, into what would prove to be a strong loyalist family. He was the fourth and youngest son of the paymaster of the customs in the port, Nathaniel Coffin.