among slavs grandpa frost comes giving children gifts. western equivalent would be santa claus or saint nicolaus. it is believed grandpa frost is different name for veles, lord of the underworld, and since he is lord of the dead, he is impotent, but wants children, so he comes and lures them with presents. it is a custom for parents to give presents to children so that they are not taken away. in grand scheme of things, veles usually steals yarilo, son of perun, and takes him to the underworld bringing winter to our world.
Bosnia and Herzegovina