An Etymological Dictionary of the German Language/Annotated/Alant
Alant (1.), masculine, ‘chub’ (a fish), from the equivalent Middle High German alant, Old High German alant, alunt, masculine, corresponds to Old Saxon alund; allied to Old Icelandic ölunn, ‘a fish’; of obscure origin, perhaps akin to Aal.
Alant (2.), masculine, ‘elecampane’ (a plant), from the equivalent Middle High German alant, Old High German alant, masculine; of obscure origin; it has been supposed to be connected with the equivalent Spanish and Portuguese ala.