Gruffudd Fychan (antiquarian spelling: Gruffydd Fychan) could refer to:
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Gruffydd Fychan ap Iorwerth (c. 1150–1221), Welsh knight and marcher lord
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Gruffudd Fychan I, Prince of Powys Fadog (reigned 1277–1284)
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Gruffudd Fychan II
Gruffudd Fychan II was Lord of Glyndyfrdwy and Lord of Cynllaith Owain c.1330–1369. As such, he had a claim to be hereditary Prince of Powys Fadog, and was a member of the Royal House of Mathrafal. His son, Owain Glyndwr, started the Welsh Rev ...
(c. 1330–1369), Lord of Glyndyfrdwy and Cynllaith and father of Owain Glyndŵr, Prince of Wales
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Gruffudd Fychan ap Gruffudd ab Ednyfed (14th century), a Welsh-language poet
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Gruffudd Vychan
Sir Gruffudd Vychan ( 1395 – 1447), also spelt in English sources as Griffith Vaughan, was a Welsh knight who supported the rebellion of Prince Owain Glyndŵr against the English, and captured the Lollard John Oldcastle, who was later immorta ...
(c. 1395–1447), Welsh knight and supporter of Owain Glyndŵr
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