1. | Owain ap Gruffudd was born about 1100; died in 1170. Owain married . Unknown [Group Sheet]
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2. | Iorwerth ab Owain (1.Owain1) was born about 1130; died in 1174. Iorwerth married Marared. Marared (daughter of Madog ap Maredudd, Prince of Powys) and died. [Group Sheet]
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3. | Llywelyn "Llywelyn the Great" ab Iorwerth, Prince of Gwynedd (2.Iorwerth2, 1.Owain1) was born about 1173; and died. Llywelyn married Joan, Lady of Wales. Joan (daughter of King John and Clementina) and died. [Group Sheet]
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4. | Gwladys Ddu (3.Llywelyn3, 2.Iorwerth2, 1.Owain1) and died. Gwladys married Ralph de Mortimer. Ralph and died. [Group Sheet]
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