From an unused root of uncertain meaning; Ladah, an Israelite -- Laadah.
Englishman's Concordance
Laadah=“order” 1) son of Shelah and grandson of Judah Part of Speech: noun proper masculine A Related Word by BDB/Strong’s Number: from an unused root of uncertain meaning
Brown-Driver-Briggs
לַעְדָּהproper name, masculinea man of Judah1 Chronicles 4:21, ᵐ5Μαδαθ, A Ααδα, ᵐ5LΛαδηι.
1 Chronicles 4:21 HEB:אֲבִ֣י לֵכָ֔ה וְלַעְדָּ֖ה אֲבִ֣י מָרֵשָׁ֑ה NAS: of Lecah and Laadah the father KJV: of Lecah, and Laadah the father INT: the father of Lecah and Laadah the father of Mareshah