וַיָּ֧שֶׂם לָהֶ֛ם שַׂ֥ר הַסָּרִיסִ֖ים שֵׁמ֑וֹת וַיָּ֨שֶׂם לְדָֽנִיֵּ֜אל בֵּ֣לְטְשַׁאצַּ֗ר וְלַֽחֲנַנְיָה֙ שַׁדְרַ֔ךְ וּלְמִֽישָׁאֵ֣ל מֵישַׁ֔ךְ וְלַעֲזַרְיָ֖ה עֲבֵ֥ד נְגֽוֹ׃
And the chief of the officers gave names unto them: unto Daniel he gave the name of Belteshazzar; and to Hananiah, of Shadrach; and to Mishael, of Meshach; and to Azariah, of Abed-nego.
Read kabbalistic (mystical) interpretation of Daniel 1:7: and classical mystical sources.