Samichlaus, giving presents and Schmutzli with the rod, to punish bad children. When we still had snow in winter.
Btw, Samichlaus and Schmutzli been christianized (though in november, not christmas like american Santa Claus) but it’s actually a pagan tradition.
Yes, they can help care and give wisdom. Directly linked to why we get that old.
Edit: apparently, other primates have grandparents too.