Ralph de Valletort of Trematon 1
- Born: Abt 1140, Bere Ferrers, Tavistock, Devon, England
- Marriage (1): Joan FitzRoy de Dunstanville of Cornwall
- Died: Abt 1187, Trematon Castle, Saltash, Cornwall, England about age 47
Ralph married Joan FitzRoy de Dunstanville of Cornwall, daughter of Reginald Rainald Fitz-Roy de Dunstanville First Earl of Cornwall and Mabel FitzRichard. (Joan FitzRoy de Dunstanville of Cornwall was born about 1142 in Launceston, Cornwall, England and died on 29 Jul 1220 in Launceston, Cornwall, England.)
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