3 occurrences in 3 dictionaries
Reference: Dedanim
Easton
the descendants of Dedan, the son of Raamah. They are mentioned in Isa 21:13 as sending out "travelling companies" which lodged "in the forest of Arabia." They are enumerated also by Ezekiel (Eze 27:20) among the merchants who supplied Tyre with precious things.
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Morish
Deda'nim
People mentioned in the 'burden upon Arabia.' Isa 21:13. They were probably the descendants of Dedan the Cushite.