Pethuel
The name Pethuel means “mouth of God; persuasion of God”.
Easton's Bible Dictionary 1897
Vision of God, the father of Joel the prophet (Joel 1:1).
Smith's Bible Dictionary 1863
(vision of God), the father of the prophet Joel. (Joel 1:1) (B.C. before 800.)
International Standard Bible Encyclopedia 1915
pe-thu'-el (pethu'el, "God's opening"): Father of Joe the prophet (Joe 1:1).