My branch of the family tree dies with me. My family name is probably in the rarest few percent (I tried checking previously and got some fraction of a percent, but I don’t know how accurate that site was). Technically, though, as several of us uploaded DNA to various sites, it’s not completely lost in that sense. However, I just don’t care, really; I think it’s weirdly self-important to be concerned with a name or bloodline carrying on like humanity won’t survive without it somehow.