Boyd’s Bible Dictionary:
An unidentified land mentioned in Isaiah 49:12
Referred by some to China.
Concise Bible Dictionary:
A remote place from which some will be brought when in a future day God is blessing Israel. The LXX has “the land of the Persians.” The land of the Sinæ, who settled in Western China, has been suggested; this would not clash with “north” and “west,” which are also mentioned in the same passage (Isa. 49:12).
Strong’s Dictionary of Hebrew Words:
Meaning:
plural of an otherwise unknown name; Sinim, a distant Oriental region
Jackson’s Dictionary of Scripture Proper Names:
thorns
Potts’ Bible Proper Names:
South country:―a distant Oriental region, probably China, Isa. 49:12. {Terra australis}