Balthasar Greek - Male Protect the king. The Greek form of the Old Testament Bel-shazzar, referring to the Babylonian God Bel. One of the Magi mentioned in Matthew's story of the Na-tivity was Balthasar. Rated 2 out of 4 stars ★ ★ ★ ★ Rating: 2.00 (3 votes) Add to favorites