I know that there is a family out there, from which I am descended. I know as much as can be known about my distant ancestors.
My maternal grandmother ran away from home as a young teen, and her memory and the details of her childhood are sketchy, and involved organized crime.
My great grandmother also ran away from home at a fairly young age, and didn't reconnect with any of her family until after her father and step mother had died. I can guess why, but I'll never know why.