Smith's Bible Dictionary
Kad'mi-el. (before God). One of the Levites who, with his family, returned from Babylon with Zerubbabel. Ezra 2:40; Nehemiah 7:43. He and his house are mentioned in history on three occasions - Ezra 3:9; Nehemiah 9:4-5; Nehemiah 10:9. (B.C. 535-410).
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Smith, William, Dr. Entry for 'Kadmiel'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/k/kadmiel.html. 1901.