4 occurrences in 4 dictionaries
Reference: Ithnan
Fausets
A town in the far S. of Judah, bordering on the desert (Jos 15:23-24; 1Sa 15:4).
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Morish
Ith'nan
City in the extreme south of Judah. Jos 15:23. Not identified.
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Smith
Ith'nan
(given), one of the towns in the extreme south of Judah.
No trace of its existence has yet been discovered.