|Easton's Bible Dictionary|
Leaders, a race descended from Javan (Genesis 10:4). They are known in profane history as the Dardani, originally inhabiting Illyricum. They were a semi-Pelasgic race, and in the ethnographical table (Genesis 10) they are grouped with the Chittim (q.v.). In 1 Chronicles 1:7, they are called Rodanim. The LXX. and the Samaritan Version also read Rhodii, whence some have concluded that the Rhodians, the inhabitants of the island of Rhodes, are meant.
Int. 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 1 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).
Dodanim (2 Occurrences)
Genesis 10:4 The sons of Javan: Elishah, Tarshish, Kittim, and Dodanim. (WEB KJV JPS ASV BBE DBY WBS YLT NAS)
1 Chronicles 1:7 And the sons of Javan; Elishah, and Tarshish, Kittim, and Dodanim. (KJV WBS YLT)