From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

DISHON . 1. A son of SeirGenesis 36:21 =   1 Chronicles 1:38 ). 2. A son of Anah and grandson of Seir (  Genesis 36:25 , cf.   Genesis 36:30 =   1 Chronicles 1:41; Dishon should also be read for MT [Note: Massoretic Text.] Dishan in   Genesis 36:26 ). Dishan and Dishon are, of course, not individual names, but the eponyms of Horite clans. Their exact location is a matter of uncertainty.

Morrish Bible Dictionary [2]

1. Fifth son of Seir the Horite.  Genesis 36:21,26,30;  1 Chronicles 1:38,41 .

2. Son of Anah and grandson of Seir.  Genesis 36:25;  1 Chronicles 1:41 .

Smith's Bible Dictionary [3]

Di'shon. (Antelope). The fifth son of Seir.  Genesis 36:21;  Genesis 36:26;  Genesis 36:30;  1 Chronicles 1:38.

Fausset's Bible Dictionary [4]

1. (See Dishan .)  Genesis 36:20-21-26;  Genesis 36:30.

2.  Genesis 36:25.

Holman Bible Dictionary [5]

 Genesis 36:21 36:25-26 36:30

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [6]

(Hebrews Dishon", דִּישִׁוֹן , antilope; Sept. Δησών , in  1 Chronicles 1:41 Δαισών ), the name of two descendants of Seir the Horite. Dishon and Dishan belong to the same root, which may possibly reappear in the name Deish noticed by Abulfeda ( Hist. Anteisl . page 196). The geographical position of the tribes descended from these patriarchs is uncertain. Knobel ( Comm . in loc.) places them to the E. and S.E. of the Gulf of Akaba, on the ground that the names of Dishon's sons, Eshban and Hemdan, may be identified with Usbany and Humneidy, branches, of the tribe of Omran. Such identifications must be received with caution, as similar names are found in other parts of Arabia-Hamde, for instance, near Tayf, and again Hamdan, which bears a still closer resemblance to the original name, near Sana (Burckhardt's Arabia , 1:156; 2:376). (See Horite).

1. Seir's fifth son, and head of one of the aboriginal Idumaean tribes ( Genesis 36:21;  Genesis 36:30;  1 Chronicles 1:38). B.C. cir. 1963. In the original of  Genesis 36:26, where his four sons are mentioned, the name is, by some transposition, DISHAN, which our translators (following the Sept. and the parallel passage  1 Chronicles 1:41) have correctly changed to "Dishon." 2. His grandson, the only son of Anah, and brother of Aholibamah, Esau's second wife ( Genesis 36:25;  1 Chronicles 1:41). B.C. considerably post 1963.