The Navidson family is central to the narrative of "The Navidson Record," a fictional documentary within the novel "House of Leaves" by Mark Z. Danielewski. The family consists of Will Navidson, a photojournalist, his partner Karen Green, and their two children. They move into a house in Virginia that exhibits strange and supernatural properties. As the story unfolds, the house reveals itself to be larger on the inside than it is on the outside, leading to a series of unsettling discoveries. The family's experiences in the house explore themes of perception, reality, and the nature of fear, making the Navidsons a focal point for the novel's complex narrative structure.