Edom, Edomite, Idumea, Seir, Teman

Facts

Edom was another name for Esau; the Edomites were his descendants. The country of Edom was also known as "Idumea" or "Seir."

Edom was mountainous and was located to the south and east of Israel.
The word for Edom means "red," which may refer to the fact that Esau was covered with red hair when he was born. Or it may refer to the red lentil stew that Esau traded his birthright for.
In the Old Testament, the country of Edom is often mentioned as an enemy of Israel.
God gave the Old Testament prophets many negative prophecies to speak against Edom. The entire book of Obadiah is about the destruction of Edom.