Ruga may refer to: Ruga (anatomy), an anatomical fold Ruga, Nepal Ruga language, an extinct Sino-Tibetan language that was spoken in Meghalaya, India Ruga-Ruga, irregular troops in Eastern Africa, often deployed by western colonial forces Rugila, 5th-century Hunnic ruler Spurius Carvilius Ruga, 3rd-century Roman grammarian who invented the letter g