Alice C. Linsley
The terms Edom and Idumea refer to the same territory; the "land of red people." The extend of that territory was much larger than is generally shown on maps.
Note that Idumea and Edom are shown on this map as separate territories. However, they were one territory in Abraham’s time and Edom extended as far north as Hebron, where Sarah resided.
Data from the book of Ruth indicates that the territory of the Edomites extended even to Bethlehem where Boaz lived.
Boaz is derived from the Akkadian Bu-Uz-Kir which means “being of the land belonging to Uz.” Job was of the clan of Uz. According to Genesis 36, the clan was named for Uz, the grandson of Seir the Horite Hebrew ruler of Edom (see diagram above). This is significant because it means that the Hebrew clans of Edom held land in Bethlehem.
The word Bo, Bu or Ba is found many Afroasiatic languages. For example, BoSede in Yoruba means “Born on Sunday” or “Being of Sunday.” Ba is a Fula prefix indicating a person's homeland or point of origin.