 Ha ' K 'in Xook , who has also been referred to as Ruler 6 , was likely the son of Itzam K 'an Ahk II , based on a translation of Stela 23 . According to both Simon Martin and <unk> Grube , as well as Johnson , Ha ' K 'in Xook 's name translates to " Water Sun Shark " . Of note , his name does not feature a turtle glyph , a feature found in all the previous rulers of Piedras Negras , as well as his successor . He ascended the throne on February 14 , 767 AD ( 9 @.@ 16 @.@ 16 @.@ 0 @.@ 4 , 7 K 'an 17 Pop in the Long Count ) , following the death of his brother Yo 'nal Ahk III . Ha ' K 'in Xook 's kingship of Piedras Negras had originally been overlooked by <unk> <unk> , who instead assigned the title Ruler 6 to a <unk> <unk> — or Maya leader — of La <unk> 
