Where does “elva” come from?

elva (Swedish) comes from Old Swedish ællivu, from Old Norse ellifu, from Proto-Germanic ainalif, from Proto-Germanic -lif, from Proto-Indo-European leyp-, from Proto-Indo-European lēy- — to leave, let; to want, desire; to let; leave...

elva (Swedish): eleven; a group of eleven, a football team; a...