James Smith Bush
Rev. James Smith Bush was an attorney, Episcopal priest, and religious writer, and an ancestor of the Bush political family. He was the father of business magnate Samuel Prescott Bush, grandfather of former US Senator Prescott Bush, greatgrandfather of former US President George H. W. Bush and greatgreatgrandfather of former US President George W. Bush.
James Smith Bush was born in Rochester, New York to Obadiah Newcomb Bush and Harriet Smith . In 1851, his father, returning from the California Gold Rush after two years in order to reclaim his family and bring them west, died aboard the ship of his return voyage and was buried at sea.
Source: Wikipedia