apparently from H1858 and H1843; pearl of knowledge; Darda, an Israelite; Darda.
Usages throughout the bible
1 Kings 4:31
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For he was wiser than all men; than Ethan the Ezrahite, and Heman, and Chalcol, and Darda, H1862 the sons of Mahol: and his fame was in all nations round about.