Abd ar-Rahman Gaourang II (also Gaorang or Gwaranga c. 1858 – 1918) was Mbang of Bagirmi from 1885 to 1918. He came to power at a time when the sultanate was in terminal decline, subject to both Wadai and Bornu. The Sudanese warlord Rabih az-Zubayr made him his vassal in 1893. Gaourang signed a treaty that made his sultanate a French protectorate in 1897.After the final defeat of Rabih in 1900 he ruled as a subordinate of the French in Chad until his death in 1918.