The Hebrew proper name Echi (אֶחִי) is related to echad (one, unity) or ach (brother), meaning "unity" or "my brother." It appears in the list of the sons of Benjamin who went down to Egypt with Jacob's family (Genesis 46:21). The name represents the tribal heritage of Benjamin and the continuation of Israel's family line into Egypt and ultimately toward the Exodus.
The genealogy of Jacob's descent into Egypt (Genesis 46) is more than a family register — it is a theology of divine preservation. Every name, including Echi, represents a life that God sovereignly carried through famine into Egypt, and whose descendants He would bring out in the great Exodus. Paul meditates on this: "those he predestined, he also called; those he called, he also justified" (Romans 8:30). Not one name on Jacob's list was an accident. The concept of echad (unity/oneness) embedded in this name points forward to Israel's unity as a people and ultimately to the one new humanity in Christ (Ephesians 2:15).