Owain Lawgoch, full name Owain ap Thomas ap Rhodri, was a Welsh soldier who served in Lombardy, France, Alsace, and Switzerland. He led a Free Company fighting for the French against the English in the Hundred Years' War. As a politically active descendant of Llywelyn the Great in the male line, he was a claimant to the title of Prince of Gwynedd and of Wales.

Llywelyn ab Iorwerth, also known as Llywelyn the Great, was a medieval Welsh ruler. He succeeded his uncle, Dafydd ab Owain Gwynedd, as King of Gwynedd in 1195. By a combination of war and diplomacy he dominated Wales for 45 years.