How was William James related to the novelist Henry James?

William James, the American psychologist and philosopher, was the elder brother of the novelist Henry James. Both men were the sons of Henry James, an American philosophical theologian.1234

Growing up in a family that traveled extensively between the United States and Europe, the two brothers were raised in an intellectually stimulating environment shaped by their father’s philosophical interests. While William became a prominent figure in philosophy and psychology, Henry pursued a career in literature, eventually becoming one of the most significant novelists of his time.231