Once you have located all the Kings in the grid, the remaining letters, when unjumbled, will spell out another ruler.

RHMNNDHJSU
JEAOAAEERE
EZHMDVSREL
HETOAISOJA
OKOLBDABJH
AIJOAONOOA
SAHSAMAASJ
HHAHSRMMII
TUAIHISSAB
LBCHAIZAHA

ABIJAH
DAVID
JOSIAH
REHOBOAM
AHAB
ELAH
JOTHAM
SAUL
AHAZIAH
HEZEKIAH
MANASSEH
SOLOMON
ASA
JEHOASH
NADAB
BAASHA
JEROBOAM
OMRI

solution...