RecknagelGerman from Middle High German recken "to raise or lift" (here in the imperative) and nagel "nail" hence a metonymic occupational name for a blacksmith or perhaps an obscene nickname (with a transferred sense for nagel i.e. ‘penis’).
ToddeItalian From a modification of Latin tollere "to lift, to raise; to destroy". Alternately, may derive from the medieval Sardinian name Totolle.