I'd like to propose a "does not exist" site that does not exist: This Family Does Not Exist. Generate faces and a family tree, where I can see familial resemblance and where that resemblance follows our understanding of genetics.

Related business: let me upload photos of my relatives and a family tree, and show me generated faces for other people on the family tree (e.g., common ancestors) based on these inputs and genetics. I wonder what kind of accuracy can be achieved in generating a person's face, based on how many descendants' faces we have photos of, over how many generations, with how much inbreeding, etc.