Skögul and Geirskögul

In Norse mythology, Skögul (Old Norse: Skǫgul, "shaker" or possibly "high-towering") and Geirskögul (Old Norse: Geirskǫgul, "spear-skögul") are valkyries who alternately appear as separate or individual figures. Both valkyries appear in Heimskringla where they seem to be the same being, and are otherwise listed separately in the valkyrie lists in the Poetic Edda poems Völuspá and Grímnismál, the longer of the two valkyrie lists in Skáldskaparmál yet Skögul appears alone in the shorter of the two. Skögul appears in kennings but Geirskögul does not.