Styx
... that Styx's name derives from its seeming to have "come from the underworld"?
... that <i id="mwBsM"><b id="mwBsQ"><a class="mw-redirect" href="./Styx_(butterfly)" id="mwBsU" rel="mw:WikiLink" title="Styx (butterfly)">Styx</a></b></i><span about="#mwt84" class="nowrap" data-mw="{&quot;parts&quot;:[{&quot;template&quot;:{&quot;target&quot;:{&quot;wt&quot;:&quot;'s&quot;,&quot;href&quot;:&quot;./Template:'s&quot;},&quot;params&quot;:{},&quot;i&quot;:0}}]}" id="mwBsY" style="padding-left:0.1em;" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span>s</span> name derives from its seeming to have "come from the underworld"?