 Ha ' K 'in Xook ( <unk> pronunciation : [ <unk> k ’ in <unk> ] ) , also known as Ruler 6 , was an <unk> of Piedras Negras , an ancient Maya settlement in Guatemala . He ruled during the Late Classic Period , from 767 – 780 AD . Ha ' K 'in Xook was a son of Itzam K 'an Ahk II , and he ascended the throne upon the death of his brother , Yo 'nal Ahk III . Ha ' K 'in Xook 's reign seems to have ended either with his death or his abdication in favor of his brother K 'inich Yat Ahk II ; archaeologists and <unk> have not come to a clear consensus on this . Ha ' K 'in Xook left behind several monuments , including stelae at Piedras Negras and a stone fragment from El Porvenir . In addition , a stone seat known as Throne 1 which was erected by K 'inich Yat Ahk II , records either the death or abdication of Ha ' K 'in Xook . 
