Roman of Le Puy, also known as Romanus of Puy, was the first lord of Oultrejordain in the Kingdom of Jerusalem from around 1120 to around 1126. He was a nobleman from Auvergne who accompanied Adhemar de Monteil, Bishop of Le Puy, to the Holy Land during the First Crusade. He signed royal charters during the reign of Baldwin I of Jerusalem. Baldwin I or his successor, Baldwin II of Jerusalem, granted Roman the important fief of Oultrejordain, or its northern region. He was deprived of most of his domains because of a rebellion against Baldwin II. He and his son lost their remaining estates after they were accused of conspiring against Baldwin II's successor, Fulk of Anjou, in the early 1130s.

The Lordship of Oultrejordain or Oultrejourdain was the name used during the Crusades for an extensive and partly undefined region to the east of the Jordan River, an area known in ancient times as Edom and Moab. It was also referred to as Transjordan.