Bildad the Shuhite - Supposed to be a descendant of Shuah, one of the sons of Abraham, by Keturah, who dwelt in Arabia Deserta, called in Scripture the east country. See Genesis 25:1, Genesis 25:2, Genesis 25:6.

Bildad.

Job 2:11 Now when Job's three friends heard of all this evil that was come on him, they came every one from his own place; Eliphaz the Temanite...

The Hebrew Sages and their Proverbs
[Sidenote: Role of the sages in Israel's life] In the days of Jeremiah and Ezekiel (Jer. xviii. 18; Ezek. vii. 26) three distinct classes of religious teachers were recognized by the people: the prophets, the priests, and the wise men or sages. From their lips and pens have come practically all the writings of the Old Testament. Of these three classes the wise men or sages are far less prominent or well known. They wrote no history of Israel, they preached no public sermons, nor do they appear …
Charles Foster Kent—The Origin & Permanent Value of the Old Testament