Once you have located all the non-jewish rulers and kings in the grid, the remaining letters, when unjumbled, will spell out another well known King.

ABIMALECHH
DNAUGUSTUS
OETXRZGAGA
NRIIIJABIN
IOBLPGOOKB
ZNEEPAECCA
EORFAHSEML
DLIIDLENML
EGUOILLAGA
KESUTSEFET

ABIMALECH
AUGUSTUS
JABIN
SANBALLAT
ADONIZEDEK
EGLON
MESHA
TIBERIUS
AGAG
FELIX
NECO
AGRIPPA
FESTUS
NERO
ANTIPAS
GALLIO
OG

solution...