Reference: Hagarenes
Fausets
E. of Palestine. Fell by the hand of Reuben, Gad, and half Manasseh, in the time of Saul; these occupied their tents and land in eastern Gilead (1Ch 5:10,18-20). Jetur, Nephish, and Nodab, Hagarites, are mentioned as "delivered into their hand, and all that were with them: for they cried to God in the battle (and they were helped against them), and He was entreated of them; because they put their trust in Him. And they took away their cattle ... camels ... sheep ... donkeys ... for there fell down many slain, because the war was of God. And they dwelt in their steads, until the captivity."
The spoil shows their wealth as nomadic tribes. In Ps 83:6-8 "the tabernacles of the Hagarenes" are mentioned as distinct from the "Ishmaelites," with whom and Moab, Gebal, Ammon, Amalek, Philistia, Tyre, and Assur, they confederated to invade suddenly Jehoshaphat's land and take it in possession. The Hagarenes probably were named not from Ishmael's mother Hagar directly, but from a district or town so-called; possibly now Hejer, capital and subdivision of the province el-Bahreyn in N.E. Arabia, on the Persian gulf.
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Hastings
Morish
Hagare'nes Hagarites. Hagari'tes
People in Arabia on whom the two and a half tribes made war. The great spoil captured shows that they were a wealthy tribe. 1Ch 5:10,19-22; Ps 83:6. The origin of the name, and where they abode, is not known. In the above Psalm they are distinguished from the Ishmaelites.
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Watsons
HAGARENES, the descendants of Ishmael: called also Ishmaelites and Saracens, or Arabians, from their country. Their name, Saracens, is not derived, as some have thought, from Sarah, Abraham's wife, but from the Hebrew sarak, which signifies "to rob" or "to steal;" because they mostly carry on the trade of thieving: or from Sahara, the desert; Saracens, inhabitants of the desert. But some writers think Hagarene imports south, conformably to the Arabic; hence Hagar, that is, the southern woman; and Mount Sinai is called Hagar, that is, the southern mountain, Ga 4:25. But there seems also to have been a particular tribe who bore this name more exclusively, as the Hagarenes are sometimes mentioned in Scripture distinct from the Ishmaelites, Ps 83:6; 1Ch 5:19.