Question: was there a king of jerusalem with leprosy

Answer: Yes, Baldwin IV (French: Baudouin; Latin: Balduinus; 1161 -- 16 March 1185), called the Leper, or The Leper King, reigned as King of Jerusalem from 1174 until his death. He was the son of Amalric I of Jerusalem and his first wife, Agnes of Courtenay.