"Dinogad's Smock" or "Dinogad's Cloak" (Old Welsh: Peis Dinogat; Welsh: Pais Dinogad) is an Old Welsh lullaby recounting the hunting prowess of the dead father of an infant named Dinogad, who is wrapped in a smock made of marten skins. This garment gives the poem its modern title. The poem is known from the 13th-century Book of Aneirin, which was created at a monastery in Wales. It survived as an interpolation in the manuscript of the early medieval epic poem Y Gododdin, attributed to the semi-legendary bard Aneirin.