The word Edomiy designates a member of the Edomite people — the descendants of Esau, Jacob's twin brother. The name traces to Esau's sale of his birthright for red (adom) stew (Genesis 25:30).
The Edomites represent the ongoing tension between flesh and spirit within the covenant family. Esau chose immediate gratification over birthright — a warning against despising spiritual inheritance. Yet Deuteronomy 23:7-8 shows even Edomites were to be welcomed after three generations, displaying God's mercy. Amos 9:12 speaks of a remnant of Edom included in God's restored kingdom.