Pethuel is known only as the father of the prophet Joel, mentioned in the opening verse of that book. His name may derive from roots suggesting persuasion or opening, hinting at divine revelation or enablement. The Septuagint renders it as Bathuel, showing some textual fluidity. Like many patronymic references in prophetic books, Pethuel grounds the prophet in a family lineage, lending authority and historical placement to Joel's oracles.