כּוֹכָב kôwkâb (H3556)

a star (as round or as shining); figuratively, a prince

1) star 1a) of Messiah, brothers, youth, numerous progeny, personification, God's omniscience (fig.)

probably from the same as כַּבּוֹן (H3522) (in the sense of rolling) or כָּוָה (H3554) (in the sense of blazing);