When William Gaghagen was born on 19 June 1789, in Lurgan, Lurgan Township, Franklin, Pennsylvania, United States, his father, Thomas R Gahagan, was 50 and his mother, Christiana Jungerman Young, was 34. He had at least 4 sons and 4 daughters with Elizabeth Lantz. He lived in Mahoning Township, Indiana, Pennsylvania, United States for about 10 years. He died on 19 June 1837, in Porter, Porter Township, Jefferson, Pennsylvania, United States, at the age of 48, and was buried in Dayton, Armstrong, Pennsylvania, United States.