Geraldine Bonner (1870-1930) was an American author, born on Staten Island, New York. Her father, John Bonner was a journalist and historical writer. As a child, Geraldine Bonner moved to Colorado where she lived in mining camps. After moving to San Francisco, California, she worked at a newspaper, the Argonaut, in 1887, and subsequently. She wrote the novel Hard Pan (1900) and used the name Hard Pan as a pseudonym.