King Louis I of Naples
... that King Louis I of Naples had one cousin murdered so he could marry another, and was described by Petrarch as "violent and mendacious, prodigal and avaricious, debauched and cruel"?
... that <b id="mwBxU"><a class="mw-redirect" href="./Louis,_Prince_of_Taranto" id="mwBxY" rel="mw:WikiLink" title="Louis, Prince of Taranto">King Louis I of Naples</a></b> had <a href="./Andrew,_Duke_of_Calabria" id="mwBxc" rel="mw:WikiLink" title="Andrew, Duke of Calabria">one cousin</a> murdered so he could marry <a href="./Joanna_I_of_Naples" id="mwBxg" rel="mw:WikiLink" title="Joanna I of Naples">another</a>, and was described by <a href="./Petrarch" id="mwBxk" rel="mw:WikiLink" title="Petrarch">Petrarch</a> as "violent and mendacious, prodigal and avaricious, debauched and cruel"?