The same as tsuwr; rock; Tsur, the name of a Midianite and of an Israelite -- Zur.
see HEBREW tsuwr
H6698. Tsur
II. צוּר proper name, masculine Σουρ (Rock); —
1 a prince of Midian Numbers 25:15; 31:8; Joshua 13:21.
2 Gibeon-ite 1 Chronicles 8:30; 9:36.