Where does “samettitatti” come from?

samettitatti (Finnish) comes from Finnish sametti, from Swedish sammet, from Middle Low German sammet, from Old French samit, from Latin samitum, from Ancient Greek ἑξάμιτον, from Ancient Greek ἕξ, from Proto-Hellenic hwéks — six.

samettitatti (Finnish): suede bolete, brown and yellow bolete, boring brown bolete, yellow-cracked bolete, Xerocomus subtomentosus species of bolete fungus with olive to tan fruit body with a distinctive velvety surface