Hagarenes; Hagarites

Boyd’s Bible Dictionary:

(1 Chron. 5:10-20; 27:3110And in the days of Saul they made war with the Hagarites, who fell by their hand: and they dwelt in their tents throughout all the east land of Gilead. 11And the children of Gad dwelt over against them, in the land of Bashan unto Salchah: 12Joel the chief, and Shapham the next, and Jaanai, and Shaphat in Bashan. 13And their brethren of the house of their fathers were, Michael, and Meshullam, and Sheba, and Jorai, and Jachan, and Zia, and Heber, seven. 14These are the children of Abihail the son of Huri, the son of Jaroah, the son of Gilead, the son of Michael, the son of Jeshishai, the son of Jahdo, the son of Buz; 15Ahi the son of Abdiel, the son of Guni, chief of the house of their fathers. 16And they dwelt in Gilead in Bashan, and in her towns, and in all the suburbs of Sharon, upon their borders. 17All these were reckoned by genealogies in the days of Jotham king of Judah, and in the days of Jeroboam king of Israel. 18The sons of Reuben, and the Gadites, and half the tribe of Manasseh, of valiant men, men able to bear buckler and sword, and to shoot with bow, and skilful in war, were four and forty thousand seven hundred and threescore, that went out to the war. 19And they made war with the Hagarites, with Jetur, and Nephish, and Nodab. 20And they were helped against them, and the Hagarites were delivered into their hand, and all that were with them: for they cried to God in the battle, and he was entreated of them; because they put their trust in him. (1 Chronicles 5:10‑20)
31And over the flocks was Jaziz the Hagerite. All these were the rulers of the substance which was king David's. (1 Chronicles 27:31)
; Psa. 83:66The tabernacles of Edom, and the Ishmaelites; of Moab, and the Hagarenes; (Psalm 83:6)).

Concise Bible Dictionary:

Jackson’s Dictionary of Scripture Proper Names:

masculine plural of Hagar