Tudur is the Welsh form of the given name Theodoric. People called Tudur include:
- Tewdrig, king of Glywysing (fl. 6th century)
- Tudur Hen (Theodoric the Old), eponymous founder of the Tudor dynasty
- Tudur ap Gwyn Hagr (fl. second half of the 14th century), a Welsh language poet
- Tudur Penllyn (1420–1490), Welsh language poet
- Tudur Aled (1465–1525), late medieval Welsh poet, born in Llansannan, Denbighshire
- Siôn Tudur (1522–1602), Welsh language poet
- R Tudur Jones (1921–1998), Welsh Nationalist and a Protestant Christian
- Owain Tudur Jones (born 1984), Wales international footballer
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