Mordecai the Jew was second in rank to King Xerxes, preeminent among the Jews, and held in high esteem by his many fellow Jews, because he worked for the good of his people and spoke up for the welfare of all the Jews.
NIV
For Mordecai the Jew was next to King Ahasuerus and great among the Jews, and was a favorite with the multitude of his brethren, for he sought the welfare of his people and spoke peace to his whole race.
AMP
For Mordecai the Jew was next unto king Ahasuerus, and great among the Jews, and accepted of the multitude of his brethren, seeking the wealth of his people, and speaking peace to all his seed.
KJV