Ho'rim and Ho'rites
Of mount Seir

Ho'rim and Ho'rites (descendants of Hori), the aboriginal inhabitants of Mount Seir, Gen. 14:6, and probably allied to the Emim and Rephaim. The name Horite appears to have been derived from their habits as “cave-dwellers.”

Their excavated dwellings are still found in hundreds in the sandstone cliffs and mountains of Edom, and especially in Petra.
Smith's Bible Dictionary

Emims: OT:368 'Eymiym (ay-meem'); plural of OT:367; terrors; Emim, an early Canaanitish (or Maobitish) tribe: KJV - Emims.        OT:367 'eymah (ay-maw'); or (shortened) 'emah (ay-maw'); from the same as OT:366; fright; concrete, an idol (as a bugbear): KJV - dread, fear, horror, idol, terrible, terror.   OT:366 'ayom (aw-yome'); from an unused root (meaning to frighten); frightful: KJV - terrible.

Zuzims: OT:2104 Zuwziym (zoo-zeem'); plural probably from the same as OT:2123; prominent; Zuzites, an aboriginal tribe of Palestine: KJV - Zuzims.        OT:2123 ziyz (zeez); from an unused root apparently meaning to be conspicuous; fulness of the breast; also a moving creature: KJV - abundance, wild beast.

Horites: OT:2752 Choriy (kho-ree'); from OT:2356; cave-dweller or troglodyte; a Chorite or aboriginal Idumaean: KJV - Horims, Horites.        OT:2356 chowr (khore); or (shortened) chor (khore); the same as OT:2352; a cavity, socket, den: KJV - cave, hole.   OT:2352 chuwr (khoor); or (shortened) chur (khoor); from an unused root probably meaning to bore; the crevice of a serpent; the cell of a prison: -hole.

Rephaims: OT:7497 rapha' (raw-faw'); or raphah (raw-faw'); from OT:7495 in the sense of invigorating; a giant: KJV - giant, Rapha, Rephaim (-s). See also OT:1051.        OT:7495 rapha' (raw-faw'); or raphah (raw-faw'); a primitive root; properly, to mend (by stitching), i.e. (figuratively) to cure:   OT:1051 Beyth Rapha' (bayth raw-faw'); from OT:1004 and OT:7497; house of (the) giant; Beth-Rapha, an Israelite: