Seir

An Edomite, in the time of the Patriarchs · Edom · named in 3 verses

the name means rough Strong's Lexicon

Seir was a Horite chief and an ancestor of the Horites who inhabited the land of Seir.

From Easton's Bible Dictionary

Rough; hairy. (1.) A Horite; one of the "dukes" of Edom (Gen. 36:20-30).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

From STEPBible's TIPNR genealogy data. A relationship the data marks uncertain is not shown here.

First named at Genesis 36:20.

Genesis 36:20 These are the sons of Seir the Horite, who were living in the land: Lotan, Shobal, Zibeon, Anah,
Genesis 36:21 Dishon, Ezer, and Dishan. They are the chiefs of the Horites, the descendants of Seir in the land of Edom.
1 Chronicles 1:38 The sons of Seir: Lotan, Shobal, Zibeon, Anah, Dishon, Ezer, and Dishan.