The meaning of Dodanim in the Bible
(From International Standard Bible Encyclopedia)

do'-da-nim (dodhanim, "leaders"): In Genesis 10:4, the son of Javan, the son of Japheth. This would place the Dodanim among the Ioninns. The parallel passage I Chronicles 1:7, with the Septuagint and Samaritan Pentateuch, has, however, "Rodanim," which is probably the true reading. This identifies the people with the Rhodians (compare on Ezekiel 27:15 under DEDAN).

See more on the meaning of Dodanim in the Bible:
Dodanim {Easton's Bible Dictionary}

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