Jehoshabeath's name
Another thought on the name Jehoshabeath. Rather than referring to Jehoshabeath's faithfulness, it seems to clearly refer to God's faithfulness in keeping the covenant that He made with David:
"Yet the LORD would not destroy Judah, for the sake of His servant David, as He promised him to give a lamp to him and his sons forever."
"Yet the LORD would not destroy the house of David, because of the covenant that He had made with David, and since He had promised to give a lamp to him and to his sons forever."
2 kings 8:18; 2 chronicles 21:7
"Yet the LORD would not destroy Judah, for the sake of His servant David, as He promised him to give a lamp to him and his sons forever."
"Yet the LORD would not destroy the house of David, because of the covenant that He had made with David, and since He had promised to give a lamp to him and to his sons forever."
2 kings 8:18; 2 chronicles 21:7