Genetic information affects patients’ families differently than other types of medical information. Family members might have a compelling interest in patients’ genetic information, but who counts as family? In this article, I assess current definitions of family and propose a pluralistic account of family, which comprises definitions of family based on biomedical, legal, and functional aspects. Respectful of various forms of family, a pluralistic account includes those with interests in genetic information. Finally, I apply it in the hypothetical case of (...) a sperm donor with a hereditary condition. (shrink)