|Easton's Bible Dictionary|
A fence; hedge, (1 Chronicles 4:18; R.V., Soco)=So'choh (1 Kings 4:10; R.V., Socoh), Sho'choh (1 Samuel 17:1; R.V., Socoh), Sho'co (2 Chronicles 11:7; R.V., Soco), Sho'cho (2 Chronicles 28:18; R.V., Soco), a city in the plain or lowland of Judah, where the Philistines encamped when they invaded Judah after their defeat at Michmash. It lay on the northern side of the valley of Elah (Wady es-Sunt). It has been identified with the modern Khurbet Shuweikeh, about 14 miles south-west of Jerusalem. In this campaign Goliath was slain, and the Philistines were completely routed.
Int. Standard Bible Encyclopedia
so'-ko: Occurs in 1 Chronicles 4:18, the Revised Version (British and American) "Soco."
Socho (1 Occurrence)
2 Chronicles 28:18 And the Philistines invaded the cities of the lowland, and of the south of Judah, and took Beth-shemesh, and Ajalon, and Gederoth, and Socho and its dependent villages, and Timnah and its dependent villages, and Guimzo and its dependent villages; and they dwelt there. (DBY)