SHENAZZAR (shē-năz'ar, Heb. shen’atsar). A son of Jeconiah, i.e., Jehoiachin, son of Jehoiakim. He was born in captivity (1Chr.3.18; Shenazar kjv).

SHENAZZAR shĭ năz’ ər (שֶׁנְאַצַּ֑ר). The fourth son of the exiled King Jehoiachin (Jeconiah) and uncle of Zerubbabel (1 Chron 3:18; KJV SHENAZAR).

International Standard Bible Encyclopedia (1915)

A son of Jeconiah (Jehoiachin) and uncle of Zerubbabel (1Ch 3:18, Codex Vaticanus and Codex Alexandrinus Sanesar; Lucian, Sanasar; Vulgate (Jerome’s Latin Bible, 390-405 A.D.) Sennaser, Senneser). It is highly probable that Sheshbazzar (Ezr 1:8,11), "the prince of Judah," and Shenazzar are identical (so Meyer, Rothstein, etc.). The name is difficult; some suggest a corruption of shushbalatstsar, and as equivalent to Sin-usur, "Sin (the moon-god) protect."