Iolo

Iolo is a diminutive of Iorwerth, a Welsh name. It may refer to:

• Iolo Goch (1320–1398), Welsh bard
• Iolo Morganwg (1747–1826), Welsh poet, antiquarian, and literary forger
• Iolo Ceredig Jones (born 1947), Welsh chess player
• Iolo Williams (born 1962), Welsh television presenter
• Iolo FitzOwen, character in the computer game series Ultima