Genealogy still towers over genetics in establishing family relationships. 23andMe located just under a thousand second and more distant cousins and relatives. But, a genealogy website used in Finland has located approximately 350,000 of my closest relatives on my mother's side! The Finns love their family histories, apparently.
Seriously, more than 6% of the population of Finland has a publicly documented family relationship to me.
I've met about half a dozen of my Finnish relatives and one stayed with my family for a summer after I had left for college. The most illustrious of them was awarded a knighthood for his service to Finland by revolutionizing their waste treatment system, banishing diseases that would have otherwise afflicted Finland's people.