Hjúki and Bil
... that in Norse mythology, Hjúki and Bil have been theorized as personifying the waxing and waning moon and, due to similarities, as connected to the nursery rhyme "Jack and Jill"?
... that in <a href="./Norse_mythology" id="mwA4w" rel="mw:WikiLink" title="Norse mythology">Norse mythology</a>, <b id="mwA40"><a href="./Hjúki_and_Bil" id="mwA44" rel="mw:WikiLink" title="Hjúki and Bil">Hjúki and Bil</a></b> have been theorized as personifying the waxing and waning moon and, due to similarities, as connected to the <a href="./Nursery_rhyme" id="mwA48" rel="mw:WikiLink" title="Nursery rhyme">nursery rhyme</a> "<a href="./Jack_and_Jill_(song)" id="mwA5A" rel="mw:WikiLink" title="Jack and Jill (song)">Jack and Jill</a>"?