Iolo
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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