Bleddyn is a masculine, Welsh given name.
Other spellings of Bleddyn are: Blevin, Blevyn, Blethyn, Blethin, Blevins, Blethins, Blethyns, Plethyn, Plethin, Pleddyn, Plethin and many others.
List of bearers include:
Bleddyn ap Cynfyn (died 1075), Prince of the Welsh Kingdoms of Gwynedd and of Powys Bleddyn Bowen (born 1961), former international Wales rugby union player Bleddyn Fardd (1258–1284), Welsh-language court poet from Gwynedd Bleddyn Taylor (born 1959), Welsh rugby union player Bleddyn Williams MBE (born 1923), Welsh rugby union centre Cadwgan ap Bleddyn (1051–1111), prince of Powys in eastern Wales Iorwerth ap Bleddyn (1053–1111), prince of Powys in eastern Wales Maredudd ap Bleddyn (1047–1132), prince of Powys in eastern Wales Rhiryd ap Bleddyn (1049–1088), Welsh king of Powys Bleddyn Môn (born 1991), Welsh sailor - America's Cup, Volvo Ocean Race and Extreme Sailing Series competitor